Run capacitor
Common no-start and weak-compressor failure point. Match the microfarad and voltage rating.
Westinghouse Furnace E1 Error Code — What It Means
E1 on a Westinghouse furnace indicates a system lockout following a failed startup sequence. Westinghouse residential furnaces are manufactured by Nortek/Nordyne (the same parent behind Gibson, Frigidaire, and Maytag HVAC products) and use the ICP-derived control platform. The E1 code fires after the furnace exhausts its retry attempts — typically three ignition trials — without establishing a confirmed flame. The board then locks out until manually reset.
Common Causes
- Failed hot surface igniter — Silicon carbide igniters crack after several years of thermal cycling. A cracked igniter cannot reach ignition temperature, and the burners never light.
- Contaminated flame sensor — A film of oxidation on the sensor rod prevents the microamp flame-detection signal from reaching the board, causing the board to treat each ignition as a failure even if the flame briefly lights.
- No gas supply — A closed manual shutoff, low utility pressure, or a failed gas valve means no fuel reaches the burners despite a good igniter.
- Pressure circuit fault — If the inducer or pressure switch fault occurs before ignition begins, the board may log E1 as the generic lockout code rather than a pressure-specific code.
Step-by-Step Fix
- Reset the lockout — Turn the thermostat off, disconnect power for 30 seconds, then restore. This clears the lockout so the sequence can be observed.
- Observe the startup sequence — Watch through the sight glass during a heat call. The igniter should glow orange within 45 seconds. Failure to glow = bad igniter.
- Test the igniter — Measure resistance across the igniter leads: 40–200 Ω is serviceable. Open circuit = replace.
- Clean the flame sensor — Remove the sensor and polish the rod tip with fine steel wool. Reinstall and test.
- Verify gas is on — Confirm the shutoff valve at the furnace and the main gas supply are both open. Check that a gas range or water heater nearby is working.
- Check the pressure switch hose — Inspect for blockage, cracks, or moisture. Clear or replace as needed.
- Reset and run a full cycle — Power cycle and run a 15-minute heat call to confirm the repair holds.
Parts Often Needed
| Part | Notes |
|---|---|
| Hot surface igniter | Match Westinghouse/Nordyne model number for correct wattage |
| Flame sensor | Clean first; replace if cleaning does not resolve |
| Pressure switch | Match WC rating from original switch label |
Need Replacement Parts?
Before ordering, match the furnace part to the model number, electrical rating, and failure symptom. Check current prices on Amazon - prices and availability change frequently.
When to Call a Pro
If resetting and basic component inspection does not resolve E1 after two attempts, a technician should check gas valve operation, measure inlet gas pressure, and inspect the heat exchanger for cracks that could cause recurring lockouts.