YORK ERROR CODE • TRI-STATE AREA
York Error Code E2: Pressure Switch Fault
Your York furnace detected a venting or draft issue. Learn the causes and troubleshooting steps.
What is York Error Code E2?
York error code E2 indicates a Pressure Switch Fault. The pressure switch monitors the draft inducer motor—the small motor that exhausts combustion gases before and during burner operation. If it doesn't detect proper negative pressure, ignition is blocked as a safety measure.
This protection ensures combustion gases are properly exhausted before your furnace fires. Without it, carbon monoxide could build up inside your home.
Common Causes
Blocked Exhaust or Intake
Snow, ice, bird nests, or debris blocking outdoor PVC pipes (high-efficiency) or metal flue. Check outdoor terminations first.
Draft Inducer Motor Failure
If the inducer motor doesn't run or runs weakly, it can't create enough suction. Listen for it when the furnace starts—you should hear a humming motor.
Disconnected Pressure Tubing
The small rubber or silicone tube connecting the switch to the inducer housing can crack, slip off, or clog. Check this connection.
Clogged Condensate Drain
On 90%+ efficiency furnaces, a blocked condensate drain creates backpressure. Look for water pooled around the furnace.
Frequently Asked Questions
What is York error code E2?
York error code E2 indicates a Pressure Switch Fault. The pressure switch didn't close or opened during operation, indicating a problem with the draft inducer motor, venting, or the switch itself.
What causes York pressure switch problems?
Common causes include blocked flue or intake pipes, failed draft inducer motor, clogged condensate drain (high-efficiency units), disconnected pressure hose, or a faulty pressure switch.
How do I reset York error code E2?
Turn off power, check visible venting for blockages, ensure pressure tubing is connected, then restore power. If E2 returns, professional service is needed to diagnose the draft inducer and venting.
Can I bypass the pressure switch?
Never bypass a pressure switch. It verifies safe venting before allowing ignition. Bypassing can cause carbon monoxide buildup in your home—an invisible, deadly hazard.
What is a draft inducer motor?
The draft inducer is a small motor that pulls combustion gases through the heat exchanger and out the flue. It creates the negative pressure that the pressure switch monitors.
Why does E2 happen in cold weather?
Ice or snow can block outdoor exhaust and intake pipes. Frozen condensate lines (high-efficiency units) can also cause E2. Check outdoor terminations after snow or freezing rain.
Can a clogged condensate drain cause E2?
Yes, on high-efficiency (90%+) furnaces, a clogged condensate drain creates backpressure that prevents the pressure switch from closing. Professional drain clearing may be needed.
How long does it take to fix York E2?
Most E2 repairs complete in a single service visit. Pressure switch replacement takes 30-60 minutes. Draft inducer motor replacement may take 1-2 hours. Condensate drain clearing typically takes 30-45 minutes.
Where is the pressure switch on a York furnace?
The pressure switch is typically near the draft inducer motor, connected by a small rubber or silicone tube. It's a round device with two wires and a tube connection.
What's the difference between E1 and E2?
E1 is High Limit (overheating/airflow). E2 is Pressure Switch (draft inducer/venting). E1 relates to circulating air in your home; E2 relates to exhausting combustion gases.
Can I check the pressure switch myself?
You can check that the small tubing is connected and not cracked. You can also verify the draft inducer runs when the furnace starts. Testing the switch itself requires a manometer and multimeter.
Why does my York furnace make noise but not ignite?
If you hear the draft inducer (a humming motor sound) but the furnace doesn't proceed to ignition, the pressure switch may not be closing. This could be a switch, inducer, or venting issue.
Can wind cause York E2?
Strong winds can affect flue operation, especially on rooftop terminations. If E2 only occurs during windy conditions, a wind-resistant flue cap may help.
Is E2 dangerous?
E2 is a safety protection preventing operation when proper venting isn't confirmed. The danger comes from bypassing this protection or ignoring it—carbon monoxide can result from improper venting.
Who repairs York furnaces with E2 in the tri-state area?
Dimatic Control LLC provides expert York furnace service including E2 diagnosis. Our technicians test draft inducer operation, pressure switches, and venting integrity. Call (908) 249-9701.
Need Help with York Error Code E2?
Same-day York furnace repair throughout the tri-state area.
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