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Frigidaire Furnace Error Codes — Complete Guide

Every documented Frigidaire furnace error code with causes, fixes, and the parts you may need. Also covers: Frigidaire, Maytag, Gibson, Tappan, Westinghouse, Intertherm, Miller, Broan, NuTone.

How to read Frigidaire error codes:
Frigidaire, Frigidaire, Maytag, Gibson, Tappan, Westinghouse, Intertherm, Miller, Broan, and NuTone furnaces use a flash count system. Count the red LED flashes on the control board.

All Frigidaire Error Codes

Steady ON

Replace Control Board

Board failure.

DIY check: Power cycle. Replace if persists.

Common part needed: Shop Control Board →

Steady OFF

No Power

No power to board.

DIY check: Check breaker, switch, fuse, transformer.

Common part needed: Shop Transformer →

1 Flash

Lockout / Retries Exceeded

Ignition lockout after max attempts.

DIY check: Power cycle. Check igniter, flame sensor, gas supply.

Common part needed: Shop Igniter →

2 Flashes

Pressure Switch Error

Pressure switch did not close.

DIY check: Check condensate drain, vent, hose, inducer.

Common part needed: Shop Pressure Switch →

3 Flashes

Limit Switch Open

High limit tripped from overheating.

DIY check: Check air filter, registers, blower operation.

Common part needed: Shop Fan Motor →

4 Flashes

Flame Sensed Improperly

Flame detected when gas should be off.

DIY check: Turn off gas, call technician.

Common part needed: Shop Gas Valve →

5 Flashes

Low Flame Signal

Weak flame sensor reading.

DIY check: Clean flame sensor. Check wire.

Common part needed: Shop Flame Sensor →

6 Flashes

Power / Ground Issue

Polarity reversed or ground missing.

DIY check: Check wiring polarity and ground.

7 Flashes

Gas Valve Error

Gas valve circuit fault.

DIY check: Check valve wiring. May need replacement.

Common part needed: Shop Gas Valve →

8 Flashes

Blower Motor Fault

Blower not running or speed error.

DIY check: Check motor, capacitor, and wiring.

Common part needed: Shop Fan Motor →

When to call a technician

If the same code keeps coming back after you have addressed the obvious cause (dirty filter, flame sensor, etc.), or if you smell gas, see burn marks, or the furnace will not come out of lockout after a power cycle, call a licensed HVAC technician. Electrical and gas work carries real safety risk.

FAQ

How do I reset my Frigidaire furnace after an error code?

Turn the furnace power off at the switch or breaker for 30 seconds, then turn it back on. The control board will clear the lockout and attempt to restart. If the same code returns, the underlying problem has not been fixed.

My Frigidaire furnace shows no LED light at all

No light means no power to the control board. Check: the furnace switch is on, the breaker is not tripped, and the door safety switch is engaged (the furnace door must be fully closed). If all three check out, the control board or transformer may have failed.

Can I fix Frigidaire error codes myself?

Many codes point to simple fixes: replacing a dirty filter (codes related to overheating), cleaning the flame sensor (codes related to flame proving), or clearing a blocked condensate drain (pressure switch codes). Anything involving gas lines, wiring, or the heat exchanger should be left to a licensed technician.

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Frigidaire Furnace Error Codes — Complete Guide

All Frigidaire Error Codes

When to call a technician

FAQ