CARRIER ERROR CODE • TRI-STATE AREA
Carrier Error Code 13: Complete Troubleshooting Guide
Limit Circuit Lockout - Safety switch has been open for 3+ minutes. Learn causes, reset procedures, and when to call a professional for this critical Carrier furnace error.
What is Carrier Error Code 13?
Carrier error code 13 indicates a Limit Circuit Lockout, meaning your furnace's high limit switch or flame rollout switch has remained open for more than 3 consecutive minutes. This is a critical safety lockout that prevents the furnace from operating until the underlying problem is resolved and the system is properly reset.
Error code 13 is essentially the "escalation" of error code 33 (Limit Circuit Fault). When code 33 appears, the safety switch has opened due to overheating or flame rollout. If the condition causing code 33 persists for more than 3 minutes, the control board escalates to code 13 and locks out the system for safety.
This lockout lasts for 3 hours automatically, or can be manually reset by cycling power to the furnace. However, simply resetting without fixing the root cause will result in code 13 returning immediately. The control board uses this lockout period to force a diagnosis and repair rather than allowing repeated unsafe operation.
Critical Safety Warning
Error code 13 means your furnace detected a dangerous condition that lasted long enough to trigger a mandatory safety lockout. Never ignore this error or repeatedly reset without fixing the root cause. If code 13 recurs after basic troubleshooting (filter change, open vents), shut down your furnace and contact a licensed professional immediately. Persistent lockouts may indicate carbon monoxide risk from a cracked heat exchanger.
The most common scenario is that code 33 appears first (indicating the initial fault), and if you don't notice it quickly or if the problem is severe, the system escalates to code 13 after 3 minutes. Both codes share the same root causes—restricted airflow from dirty filters, closed vents, blower problems, or combustion issues. The difference is severity and persistence: code 13 means the problem was serious enough to warrant a mandatory safety timeout.
Common Causes of Carrier Error Code 13
Error code 13 shares the same root causes as error code 33, but the condition is more persistent or severe. Here are the most common culprits that cause the safety switch to remain open long enough to trigger the 3-minute lockout:
1Severely Restricted Airflow (Dirty Filter or High-MERV Filter)
The #1 cause of code 13. A completely clogged filter or inappropriately high MERV-rated filter (MERV 13+) restricts airflow so severely that the high limit switch stays open continuously. This is especially common after installing a new high-efficiency filter without verifying system compatibility. Standard residential furnace systems work best with MERV 8-11 filters. If code 13 appeared immediately after a filter change, this is almost certainly the cause.
2Blower Motor Failure or Capacitor Failure
If the blower motor isn't running at all or is running at significantly reduced speed due to capacitor failure, the furnace cannot circulate enough air to prevent overheating. This causes the high limit to stay open continuously, quickly triggering code 13. Signs include no airflow from vents, weak airflow, humming sounds without airflow, or the blower starting very slowly. A failed capacitor or motor requires professional replacement.
3Too Many Closed Supply Vents or Blocked Returns
Closing more than 20% of supply vents throughout your home creates excessive back pressure that prevents proper air circulation. Even with a clean filter and working blower, closed vents can restrict airflow enough to trigger code 13. This is particularly common in homes where occupants close vents in unused rooms or basement spaces. Keep at least 80% of all vents open, and ensure return registers aren't blocked by furniture, rugs, or stored items in the tri-state area.
4Dirty Evaporator Coil Severely Restricting Airflow
The AC evaporator coil sits directly above the furnace and can accumulate years of dust, pet hair, and debris if filters aren't changed regularly. A heavily soiled coil acts like a secondary filter, drastically reducing airflow even with a clean filter installed. This is especially common in homes with pets or poor historical maintenance. Professional coil cleaning during annual maintenance prevents this issue entirely.
5Heavily Soiled Blower Wheel
The blower wheel (squirrel cage fan) can accumulate substantial dirt, dust, and debris over years of operation, especially if filters were frequently neglected. Heavy buildup on the blower wheel blades significantly reduces air volume and can cause persistent overheating. Cleaning requires removing the blower assembly—a task best left to professionals to avoid damaging the delicate wheel or motor.
6Blocked or Undersized Ductwork
Ductwork that's undersized for the furnace output, crushed in crawlspaces or attics, disconnected at joints, or blocked by construction debris prevents proper air distribution. Even with perfect components, inadequate ductwork can't move enough air to prevent code 13. Signs include hot and cold spots in rooms, excessive furnace cycling, and weak airflow despite a new filter. Duct inspection and modification may be necessary for persistent code 13 issues.
7Flame Rollout Switch Repeatedly Tripping
The flame rollout switch detects flames escaping the combustion chamber—a serious safety issue. If flames consistently roll out of the burner area (due to blocked flue, insufficient combustion air, or heat exchanger cracks), the rollout switch stays open, triggering code 13. After resetting, observe the flame pattern: flames should be steady, blue, and directed into heat exchanger tubes—not rolling out or flickering yellow/orange. Persistent flame rollout requires immediate professional service.
8Insufficient Combustion Air Supply
80% efficiency furnaces require adequate combustion air from the surrounding space. If your furnace is in a tight closet, small mechanical room, or sealed space without proper ventilation, it can't get enough oxygen for clean combustion. 90%+ high-efficiency furnaces use PVC intake pipes from outdoors—check these aren't blocked by snow, ice, leaves, or bird nests. Blocked combustion air intake causes poor combustion, flame rollout, and persistent code 13 errors. This is particularly common during winter in the tri-state area.
9Failed High Limit Switch (Stuck Open)
In rare cases, the high limit switch itself fails mechanically and remains stuck in the open position even when temperatures are normal. This causes code 13 to appear immediately upon furnace startup, before any actual overheating occurs. To test, turn off power and let the furnace cool completely for 30+ minutes, then test for continuity across the switch terminals with a multimeter. No continuity when completely cool indicates switch failure. Replacement is straightforward for a qualified technician.
10Cracked Heat Exchanger (CRITICAL - IMMEDIATE PROFESSIONAL SERVICE REQUIRED)
This is the most serious cause of code 13 and presents an immediate carbon monoxide danger. A cracked heat exchanger allows deadly combustion gases to mix with your home's air supply. Signs include: code 13 recurring immediately after each reset, visible cracks or holes during inspection with a flashlight, soot buildup around the furnace cabinet, carbon monoxide detector alarms, and flame rollout switch tripping repeatedly. Heat exchangers crack due to age (15-20+ years), thermal stress from repeated overheating, or corrosion.
⚠️ IMMEDIATE ACTION REQUIRED
If you suspect a cracked heat exchanger, turn off your furnace immediately, do not attempt to use it, and contact a licensed HVAC professional for a camera inspection. Carbon monoxide is odorless and deadly. Heat exchanger replacement typically costs 60-80% of a new furnace, making replacement the more economical option for older systems. Never compromise on this safety issue.
Key Insight: Error code 13 appears when code 33's underlying issue is either very severe or wasn't addressed quickly enough. If you see code 33, fix it immediately to prevent escalation to code 13. Once code 13 appears, you know the problem has persisted for at least 3 minutes, indicating a significant airflow or combustion issue that requires thorough diagnosis.
DIY Troubleshooting Steps for Error Code 13
Before calling a professional, you can safely perform these troubleshooting steps. Follow them in exact order. If code 13 returns after completing all steps, professional diagnosis is necessary. Safety first—if you're uncomfortable with any step, call a licensed technician.
1Turn Off Power to the Furnace (MANDATORY SAFETY STEP)
Locate the power switch on or near your furnace (usually looks like a standard light switch, often with a red faceplate) and turn it to OFF. Alternatively, turn off the circuit breaker labeled "Furnace" or "HVAC" in your main electrical panel. Wait for all sounds to stop and verify the furnace display is dark before proceeding.
Safety First: Error code 13 means your furnace experienced a persistent unsafe condition. Never work on energized HVAC equipment. Electrical shock can be fatal. Always verify power is completely off before touching any components.
2Inspect and Replace the Air Filter Immediately
Locate your air filter (in the return air duct, furnace cabinet, or wall-mounted return). Remove it and inspect carefully. If you cannot see light through the filter media, if it's visibly caked with dust, or if you recently installed a MERV 13+ filter, replace it immediately with a MERV 8-11 filter appropriate for residential use.
Replacement schedule to prevent code 13:
- Standard 1-inch filters: Every 30-90 days (check monthly)
- Homes with pets: Every 30-60 days (check every 2-3 weeks)
- During peak heating season: Check every 2-4 weeks
- 4-inch or 5-inch media filters: Every 6-12 months
- After construction or renovation: Immediately
MERV Rating Critical: Code 13 frequently occurs after well-meaning homeowners install MERV 13-16 "hospital grade" filters. These restrict airflow dramatically. Unless your furnace is specifically rated for high-MERV filtration (check the manual), stick with MERV 8-11. Your indoor air quality will still be excellent, and your furnace will operate safely.
3Open ALL Supply Vents and Clear ALL Return Registers
Walk through every room in your home and fully open every supply vent (ceiling, floor, or wall vents that blow air into rooms). Ensure return registers (larger vents that pull air back to the furnace) are completely clear. Move furniture, rugs, curtains, storage boxes, and any other obstructions. This includes basement, attic, and garage vents if present.
Why This Matters for Code 13: Modern HVAC systems are carefully balanced to circulate air through the entire home. Closing vents doesn't save energy—it creates dangerous back pressure that restricts airflow and triggers safety lockouts. Keep 100% of vents open for optimal, safe operation. If certain rooms are too warm or cold, the system needs balancing by a professional, not closed vents.
4Wait 20-30 Minutes for Complete Cooling
After addressing airflow restrictions, allow the furnace to cool completely for at least 20-30 minutes. Code 13 means the high limit switch stayed open for an extended period, indicating the furnace was significantly overheated. The limit switches and flame rollout switches must return to room temperature before they'll close and allow operation.
Don't Rush This Step: High limit switches typically reset between 100-120°F (38-49°C). If the furnace cabinet is still warm to the touch, it hasn't cooled enough. Attempting to reset too early will result in immediate code 13 return. Use this time to ensure you've opened all vents and checked for other obstructions.
5Reset the System by Cycling Power
After the 20-30 minute cooling period, turn the power back ON at the furnace switch or circuit breaker. Wait 2 minutes for the control board to initialize. Set your thermostat to HEAT mode and raise the temperature above the current room temperature to call for heat. The furnace should begin its startup sequence.
What Happens: Cycling power manually resets the 3-hour lockout timer. The control board clears code 13 and attempts to start a new heating cycle. If you've successfully addressed the airflow issue, the furnace should start normally and complete a full heating cycle without code 13 returning.
6Monitor the First Complete Heating Cycle
Stay near the furnace and observe the entire first heating cycle. Listen for unusual sounds (grinding, loud humming, squealing). Feel the airflow at several vents—it should be strong and warm within 60-90 seconds of the blower starting. Check that the furnace completes a full cycle and shuts down normally when the thermostat is satisfied. Verify code 13 does NOT reappear.
Signs of successful repair:
- Strong, consistent airflow from all vents
- Furnace runs quietly without unusual noises
- Completes heating cycle without interruption
- No error codes appear on the display
- House warms comfortably to setpoint
7Check Outdoor Air Intake and Exhaust Pipes (High-Efficiency Furnaces)
If you have a high-efficiency furnace (90%+ AFUE), it uses PVC pipes extending through an exterior wall for combustion air intake and exhaust. Go outside and visually inspect these pipes (usually white or gray PVC, 2-3 inches in diameter). Clear any blockages from snow, ice, leaves, bird nests, or debris. Ensure both intake and exhaust terminations are clear.
Winter Warning: During heavy snowfall in the tri-state area, snow drifts can completely block intake/exhaust pipes. This causes insufficient combustion air, flame rollout, and code 13. Check these pipes after every significant snowfall. Consider installing a protective shield or raising the pipes if repeatedly buried by snow.
8If Code 13 Returns: STOP and Call a Professional
If error code 13 reappears within the first few minutes or first few cycles after completing all the above steps, STOP troubleshooting immediately. This indicates the problem is NOT a simple airflow restriction. Turn off the furnace and contact a licensed HVAC technician. Repeated code 13 errors can indicate serious problems like blower motor failure, capacitor failure, heat exchanger cracks, or faulty safety switches.
⚠️ Do not repeatedly reset a furnace showing persistent code 13 errors. Each reset cycle attempts to heat an unsafe system. This can worsen the underlying problem and may expose your family to carbon monoxide if the cause is a cracked heat exchanger. Professional diagnosis is required at this point.
When to Skip DIY and Call Immediately
Call a professional BEFORE attempting DIY troubleshooting if you notice any of these conditions:
- Carbon monoxide detector alarming: Evacuate immediately, call 911, then call HVAC professional
- Strong gas smell: Evacuate, call gas company emergency line, do not attempt troubleshooting
- Visible flames outside the combustion chamber: Turn off furnace, call professional immediately
- Excessive soot or rust stains around furnace: Indicates combustion problems requiring professional diagnosis
- Furnace is 15+ years old: Heat exchanger age makes cracking more likely; professional camera inspection recommended
- You smell exhaust fumes near furnace: Indicates venting problem or heat exchanger crack; shut down and call professional
When to Call a Professional for Error Code 13
While basic troubleshooting is safe for homeowners, error code 13 indicates a persistent safety issue that often requires professional diagnosis and repair. Here's when to call a licensed HVAC technician:
Call Immediately (Same-Day Service Required)
- •Code 13 returns within minutes after reset despite clean filter and open vents
- •No airflow or very weak airflow from vents when blower should be running
- •Flame rollout switch keeps tripping (check for manual reset button behind small disc on switch)
- •Blower motor makes grinding, squealing, or loud humming noises
- •Blower doesn't start at all when furnace calls for heat
- •Carbon monoxide detector alarming (evacuate first, then call)
- •Visible flames outside the combustion chamber or furnace cabinet
- •Smell of exhaust fumes or soot accumulation near furnace
- •Furnace is 15+ years old and code 13 is recurring (heat exchanger risk)
Schedule Soon (Within 1-3 Days)
- •Code 13 cleared after filter change but returns periodically
- •Airflow seems weaker than normal even with clean filter
- •Furnace hasn't had professional maintenance in 2+ years
- •You're uncomfortable performing DIY troubleshooting
- •Code 13 appears alongside other error codes (14, 31, 34)
- •Heating season just started and you want peace of mind
- •You want comprehensive system inspection after code 13
- •You suspect ductwork issues (crushed ducts, disconnected joints)
- •Blower wheel appears dirty during visual inspection
What a Professional Diagnosis Includes
When you call a licensed HVAC technician for error code 13, expect a comprehensive diagnostic process:
- Complete visual inspection of furnace, ductwork, and venting
- Airflow measurement using a calibrated anemometer (should be 350-450 CFM per ton)
- High limit switch testing with multimeter for proper operation
- Flame rollout switch inspection and testing
- Blower motor amp draw testing to verify proper operation
- Capacitor testing (capacitors weaken over time and commonly cause code 13)
- Visual and camera inspection of heat exchanger for cracks or damage
- Combustion analysis to verify safe, efficient operation
- Static pressure testing to measure ductwork resistance
- Filter fit and MERV rating verification
Professional diagnosis typically takes 45-90 minutes. The technician will provide a written estimate for any necessary repairs before proceeding with work. Most code 13 issues can be resolved in a single visit.
Get Expert Help in the Tri-State Area
Dimatic Control LLC provides expert Carrier furnace repair and error code diagnosis throughout the tri-state area. Our certified technicians have extensive experience with code 13 troubleshooting and can accurately diagnose the root cause—whether it's a simple capacitor replacement or a more complex heat exchanger issue.
- Same-day emergency service available
- Upfront pricing before work begins
- Certified Carrier technicians
- Comprehensive diagnostic testing
- All repairs backed by warranty
How to Prevent Carrier Error Code 13
Error code 13 is preventable with proper maintenance and awareness. Follow these best practices to avoid the safety lockout and keep your Carrier furnace running reliably:
Change Air Filters on Schedule (Every 30-90 Days)
Set phone reminders to check your air filter monthly during heating season. Replace it when visibly dirty or at least every 90 days (30-60 days with pets). Use the correct MERV rating—MERV 8-11 for most residential systems. Write the installation date on the filter frame with a marker. A clean filter is the single most important factor in preventing code 13. Consider upgrading to a 4-inch or 5-inch media filter that lasts 6-12 months for improved convenience and consistent air quality.
Keep All Vents Open and Unobstructed
Never close more than 1-2 vents in your home, and never close return registers. Modern HVAC systems are balanced to condition the entire home—closing vents increases pressure, reduces efficiency, and triggers safety lockouts. Rearrange furniture to ensure supply vents and return registers have at least 12 inches of clearance. If certain rooms are uncomfortable, call a professional for system balancing rather than closing vents. Check regularly that children haven't closed vents in their rooms.
Schedule Annual Professional Maintenance
Book a professional furnace tune-up every fall before heating season begins. Comprehensive maintenance includes cleaning the blower wheel, inspecting the heat exchanger, testing safety switches, measuring airflow, testing capacitor strength, checking combustion efficiency, and adjusting blower speed if necessary. Annual maintenance catches problems before they cause code 13 and extends furnace lifespan by years. Most manufacturers require annual maintenance to maintain warranty coverage.
Use the Correct Filter MERV Rating
Check your furnace manual for the manufacturer's recommended filter specifications. Most residential systems are designed for MERV 8-11 filters. Higher MERV ratings (13-16) dramatically restrict airflow and frequently cause code 13 unless the system was specifically engineered for them. If you need better air quality, consult an HVAC professional about upgrading your system to handle high-efficiency filtration, or consider adding a standalone air purifier instead of overloading your furnace.
Monitor and Clear Outdoor Intake/Exhaust Pipes (High-Efficiency Furnaces)
If you have a 90%+ AFUE furnace with PVC intake and exhaust pipes, inspect them weekly during winter. Clear snow, ice, leaves, and debris immediately. After heavy snowfall in the tri-state area, check that pipes aren't buried by snow drifts. Consider installing protective shields or extending pipes above typical snow depth. Blocked pipes cause insufficient combustion air and immediate code 13 errors. Set a recurring phone reminder to check pipes every Monday during winter.
Address Error Codes Immediately
If you see error code 33 (Limit Circuit Fault), fix it immediately before it escalates to code 13. Code 33 is the early warning—address airflow restrictions right away. Don't ignore intermittent error codes thinking "it reset itself so it's fine." Intermittent codes indicate an underlying problem that will worsen over time. Early intervention prevents costly repairs and unsafe operation. Keep a furnace error code reference guide handy so you recognize problems quickly.
Prevention is Far Cheaper Than Repair
The typical cost to prevent code 13: $150-250 annually (filters + professional maintenance). The typical cost to repair code 13 problems: $300-2,500+ depending on the component (capacitor $150-300, blower motor $400-800, heat exchanger $1,500-3,000). More importantly, proper maintenance ensures safe operation and prevents carbon monoxide exposure—priceless for your family's safety.
Related Carrier Error Codes
Error code 13 often appears alongside other codes, or homeowners encounter these codes while troubleshooting furnace problems. Understanding related codes helps with comprehensive diagnosis:
Carrier Error Code 33
Limit Circuit Fault - The initial fault condition when the high limit or flame rollout switch opens. Code 13 is the lockout that occurs when code 33 persists for 3+ minutes. If you see code 33, fix it immediately to prevent code 13.
View Complete Code 33 Guide →Carrier Error Code 14
Ignition Lockout - Furnace failed to ignite after multiple attempts. Sometimes appears alongside code 13 if airflow problems also affect ignition. Common causes include bad flame sensor, gas supply issues, or igniter failure.
View Complete Code 14 Guide →Carrier Error Code 31
Pressure Switch Fault - Inducer motor not creating sufficient draft or pressure switch failure. Can occur alongside code 13 if vent pipes are blocked or inducer motor is weak, reducing airflow and causing overheating.
View Complete Code 31 Guide →Carrier Error Code 34
Ignition Proving Failure - Flame sensor doesn't detect flame after ignition attempt. May appear with code 13 if poor combustion (from insufficient air) causes both flame sensor and rollout switch issues simultaneously.
View Complete Code 34 Guide →Multiple Error Codes? Professional Diagnosis Recommended
If your furnace displays multiple error codes in sequence (e.g., code 33, then 13, then 14), or if error codes alternate between heating cycles, this indicates a complex problem requiring professional diagnosis. Multiple codes often point to systemic issues like inadequate gas supply, major airflow restrictions, failing control board, or heat exchanger problems. Don't attempt to troubleshoot multiple codes yourself—the interaction between problems can be dangerous. Contact emergency HVAC service for same-day diagnosis and repair.
Frequently Asked Questions About Carrier Error Code 13
What is Carrier error code 13?
Carrier error code 13 is a Limit Circuit Lockout, meaning the high limit or flame rollout switch has been open for more than 3 minutes. This safety lockout prevents furnace operation until the underlying problem is fixed and the system automatically resets (after 3 hours) or is manually reset by cycling power.
What's the difference between Carrier error code 13 and 33?
Error 33 is the initial Limit Circuit Fault when the switch first opens. Error 13 is the Limit Circuit Lockout that occurs when the switch remains open for more than 3 minutes. Code 13 is more severe—it means the problem persisted long enough to trigger a safety lockout. Fix code 33's root cause first, then code 13 will clear.
How do I reset Carrier error code 13?
Code 13 resets automatically after 3 hours, or you can manually reset by turning off power to the furnace for 5 minutes, then turning it back on. However, simply resetting won't fix the problem—you must address the underlying airflow issue (dirty filter, blocked vents, blower problems, etc.) or the code will immediately return.
Why does Carrier error code 13 keep coming back?
If code 13 returns immediately after resetting, the root cause hasn't been fixed. Common persistent issues include severely restricted airflow from dirty filters or closed vents, blower motor failure, faulty capacitor, dirty evaporator coil, or a cracked heat exchanger. Professional diagnosis is recommended for recurring code 13 errors.
Can I fix Carrier error code 13 myself?
You can perform basic troubleshooting: change the air filter, open all vents, reset the system after it cools for 15+ minutes, and check for obvious airflow restrictions. However, if code 13 persists after these steps, the problem likely requires professional equipment or expertise to diagnose and repair safely.
Is Carrier error code 13 dangerous?
Error code 13 itself is a safety mechanism protecting your home from furnace overheating and potential fire hazards. However, if caused by a cracked heat exchanger, carbon monoxide can leak into your home—a life-threatening situation. Never ignore persistent code 13 errors. If they recur, shut down the furnace and call a professional immediately.
How long does the 3-hour lockout last for code 13?
The safety lockout lasts exactly 3 hours from when code 13 was triggered. After 3 hours, the control board will attempt to restart the furnace automatically. You can bypass this wait by turning off power to the furnace for 5 minutes, which manually resets the lockout. Always fix the underlying issue first.
Can a dirty filter cause Carrier error code 13?
Yes, a severely clogged filter is one of the most common causes of code 13. When airflow is restricted for more than 3 minutes, the high limit switch stays open long enough to trigger the lockout. If you recently upgraded to a MERV 13+ filter, downgrade to MERV 8-11 for residential systems.
What should I do if error code 13 appears right after code 33?
This is normal—code 13 is simply the lockout stage of code 33. When code 33 (Limit Circuit Fault) persists for more than 3 minutes, the system escalates to code 13 (Lockout). Address the airflow issue causing code 33, allow the furnace to cool completely (15+ minutes), then reset. Both codes should clear once proper operation resumes.
Can closed vents cause Carrier error code 13?
Absolutely. Closing more than 20% of supply vents creates back pressure that prevents proper airflow, causing the furnace to overheat. When this condition lasts more than 3 minutes, code 13 triggers. Open all vents throughout your home—modern HVAC systems are balanced to heat the entire space and closing vents damages efficiency.
What if error code 13 appears after changing the furnace filter?
If code 13 appears immediately after a filter change, you likely installed a filter with too high a MERV rating (MERV 13+) for your system. High-efficiency filters restrict airflow significantly. Replace with a MERV 8-11 filter suitable for residential furnaces unless your system was specifically designed for higher filtration.
How do I know if my blower motor is causing code 13?
Signs of blower motor problems include weak airflow from vents, unusual noises (grinding, squealing), the blower starting slowly or not at all, and the furnace cycling on code 13 repeatedly. A failing blower capacitor causes similar symptoms. Professional testing with a multimeter can confirm motor and capacitor function.
Can I prevent Carrier error code 13 from happening again?
Yes! Regular maintenance prevents code 13: change filters every 30-90 days (more often with pets), keep all vents open, schedule annual professional tune-ups, use the correct MERV rating for your system, ensure proper combustion air (check intake pipes aren't blocked), and address any airflow issues immediately when they arise.
What does the flame rollout switch have to do with code 13?
The flame rollout switch is one of the safety switches that can trigger code 13 if it stays open for 3+ minutes. It detects flames escaping the combustion chamber due to blocked flues, insufficient combustion air, or cracked heat exchangers. If the flame rollout switch is the cause, professional service is mandatory—this indicates a serious safety hazard.
Who can fix Carrier error code 13 in the tri-state area?
Dimatic Control LLC provides expert Carrier furnace diagnosis and repair throughout the tri-state area. Our certified technicians handle code 13 errors with same-day service and emergency availability. We diagnose the root cause, perform necessary repairs, and verify proper operation. Call (908) 356-HVAC for immediate assistance.
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