YORK ERROR CODE • TRI-STATE AREA
York Error Code E1: High Limit Open
Your York furnace has shut down due to overheating. Learn the causes and how to troubleshoot safely.
What is York Error Code E1?
York error code E1 indicates the High Temperature Limit Switch is open. This critical safety device monitors temperatures inside your furnace and shuts down gas flow when overheating is detected.
This error appears on York Affinity, Latitude, and LX series furnaces. The limit switch protects your heat exchanger from damage and prevents fire hazards from excessive temperatures.
Quick Troubleshooting
1. Replace Air Filter
The #1 cause of E1. Replace immediately if dirty.
2. Open All Vents
Ensure all supply and return vents are fully open.
3. Wait 15-20 Minutes
Let furnace cool before attempting restart.
4. Restore Power
If E1 returns, call for professional service.
Frequently Asked Questions
What is York error code E1?
York error code E1 indicates the High Temperature Limit Switch is open. This safety device has detected overheating in your furnace and shut down gas flow to prevent damage or fire hazards.
What causes York error code E1?
Common causes include dirty air filter, closed vents, blower motor failure, dirty evaporator coil, ductwork restrictions, or a faulty limit switch. Restricted airflow is the most frequent cause.
How do I fix York error code E1?
Start by replacing the air filter and opening all vents. Let the furnace cool for 15-20 minutes, then restore power. If E1 returns, professional service is needed to check the blower and other components.
Is York E1 the same as overheating?
Yes, E1 means your York furnace overheated and the limit switch opened as a safety measure. The limit switch prevents temperatures from reaching dangerous levels that could damage the heat exchanger.
Can I reset the limit switch on my York furnace?
Most York limit switches auto-reset once the furnace cools to safe temperatures. Wait 15-20 minutes after turning off the furnace, then restore power. Some models have manual reset buttons.
Why does my York furnace keep getting E1?
Recurring E1 indicates chronic airflow problems: undersized ductwork, dirty coils, weak blower motor, or incorrect blower speed settings. Professional diagnosis can identify the root cause.
How long does it take to fix York E1?
Repair time depends on the cause. Filter replacement takes minutes. Limit switch replacement typically takes 30-60 minutes. Blower motor replacement may take 1-2 hours. Coil cleaning takes about an hour. Most repairs complete in one visit.
Can a high-MERV filter cause York E1?
Yes, MERV 13+ filters restrict more airflow than standard filters. If you upgraded to a high-MERV filter and E1 appeared, try a MERV 8-11 filter unless your system is specifically designed for higher filtration.
Where is the limit switch on a York furnace?
The limit switch is typically mounted on the plenum above the heat exchanger or on the burner compartment cover. It's a disc-shaped device with wires attached.
What's the difference between York E1 and E2?
E1 is High Limit Open (overheating/airflow problem). E2 is Pressure Switch Fault (draft inducer/venting problem). They have different causes and solutions.
Can closed vents cause York E1?
Yes, closing too many supply vents or blocking return registers restricts airflow, causing overheating. Keep at least 80% of vents open for proper system operation.
Should I bypass the limit switch?
Never bypass a limit switch. It's a critical safety device. Bypassing risks fire, heat exchanger damage, and carbon monoxide exposure. Replace a faulty switch—don't bypass it.
Why does E1 happen more in winter?
Higher heating demand means longer run times and more filter loading. Check filters more frequently during peak heating season. Cold weather exposes marginal airflow issues.
Can a dirty blower wheel cause E1?
Yes, a heavily soiled blower wheel moves less air, reducing airflow across the heat exchanger. Blower wheel cleaning is part of annual maintenance and helps prevent E1.
Who repairs York furnaces with E1 in the tri-state area?
Dimatic Control LLC provides expert York furnace service throughout the tri-state area. Our technicians diagnose and repair E1 issues with same-day appointments available. Call (908) 249-9701.
Need Help with York Error Code E1?
Same-day York furnace repair throughout the tri-state area.
Call 908-249-9701