Frigidaire Furnaces Error Codes
Complete list of fault codes and troubleshooting guides. Use the search below to find your specific error.
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E1
Furnace will not start; the control board shows an E1 fault code.
Ignition Lockout / Ignition Failure
E2
Furnace starts but shuts down quickly; the control board displays E2.
Flame Sense Failure / Flame Not Proved
E3
Furnace inducer motor runs, but burners do not light; an E3 code is displayed on the control board.
Pressure Switch Open / Venting or Inducer Problem
E4
Furnace attempts to start but shuts down; an E4 code is displayed on the control board.
High Limit Switch Open / Overtemperature
E5
Furnace runs briefly then shuts off; an E5 code is displayed on the control board.
Rollout Switch Open / Flame Rollout Detected
E6
Control board shows E6; blower runs but no heat.
Open Limit or Safety Circuit Lockout
E7
Furnace does not respond to thermostat; E7 code on control board.
Thermostat or Low-Voltage Communication Fault
E8
Furnace shows E8 and shuts down; may run blower only.
Flame Detected with Gas Off / False Flame Signal
E9
Furnace displays E9; inducer may not start.
Inducer Motor Fault / Failure to Start
EA
Furnace shows EA; burners light but shut off after a few seconds.
Weak Flame Signal / Intermittent Flame Sensing
EB
Control board flashes EB; furnace may short-cycle or not start.
Line Voltage Polarity or Ground Fault
EC
Furnace displays EC; blower may run continuously.
Control Board Internal Error / EEPROM Fault
ED
Furnace shows ED; no blower operation in heat mode.
Blower Motor Fault / No Indoor Fan
EE
Furnace flashes EE; unit may not start or may shut down unexpectedly.
Ignition Lockout Due to Repeated Failures
F1
Furnace control flashes F1; unit may not respond to thermostat.
24V Transformer or Low-Voltage Power Fault
F2
Furnace flashes F2; inducer and blower may run unexpectedly.
Stuck Pressure Switch Closed
F3
Furnace flashes F3; burners may light then shut off quickly.
Flame Sense Out of Range / Flame Current Error
F4
Furnace flashes F4; no ignition, ignitor may not glow.
Ignitor Circuit Open
F5
Furnace flashes F5; blower runs continuously, no heat.
Limit Circuit Open / Continuous Fan Mode
F6
Furnace flashes F6; the unit may short-cycle or not complete the heat cycle.
Low Flame / Underfire Condition
F7
Furnace flashes F7; the unit may lock out after several attempts.
Excessive Retries / Recycle Limit Exceeded
F8
Furnace flashes F8; the blower may start but the burners do not.
Low-Heat / High-Heat Stage Fault (Two-Stage Furnace)
F9
Furnace flashes F9; the unit may overheat or shut down unexpectedly.
Blower Speed / CFM Configuration Error
Symptom
Furnace cycles on and off rapidly (every 1–5 minutes) without reaching set temperature
Rapid Cycling / Control or Airflow Issue
Symptom
Furnace frequently trips the household circuit breaker
Electrical Overload or Short Circuit
Symptom
Furnace ignites but produces yellow, flickering, or lifting flames
Improper Combustion / Incomplete Burning
Symptom
Furnace is very loud at the return grille, with strong suction and noise
Return Air Restriction / High Static Pressure
Symptom
Furnace runs but does not produce warm air; the blower is on, and air from the vents is cool.
No Heat / Burner Not Firing
Symptom
Furnace runs but some rooms are too cold while others are too warm
Uneven Heating / Air Distribution Problem
Symptom
Furnace starts but shuts down after 30–60 seconds, blower may or may not start
Limit Trip or Flame Loss Shortly After Ignition
Symptom
Furnace will not start at all; no lights on the control board, no blower or inducer operation.
No Power to Furnace
Symptom
Rust or water stains visible inside the furnace cabinet.
Internal Condensate or Humidity Problem
Symptom
The furnace blower runs continuously even when the thermostat is not calling for heat.
Continuous Blower Operation
Symptom
The furnace causes noticeable vibration or rattling in the ducts and cabinet.
Excessive Vibration / Loose Components
Symptom
The furnace emits a burning smell when it runs.
Dust Burn-Off or Overheating Component
Symptom
The furnace emits a chemical or metallic odor when heating.
Contaminated Combustion Air or Overheated Component
Symptom
The furnace makes a grinding or scraping noise from the blower area.
Blower Wheel or Motor Bearing Failure
Symptom
The furnace makes a loud banging or booming noise at startup.
Delayed Ignition / Burner Light-Off Problem
Symptom
The furnace produces a high-pitched whistling or howling noise during operation.
Airflow Restriction / Duct or Filter Noise
Symptom
The furnace short cycles: it starts, runs for a few minutes, then shuts off and restarts frequently.
Short Cycling / Overheating or Control Issue
Symptom
Thermostat calls for heat but furnace does nothing (no sound, no lights) even though power is present
Control Signal Not Reaching Furnace
Symptom
Water leaking around the base of a high-efficiency Frigidaire furnace.
Condensate Leak
| Error Code | Symptom | Fault Type | Guide |
|---|---|---|---|
| E1 |
Furnace will not start; the control board shows an E1 fault code.
|
Ignition Lockout / Ignition Failure | View Details |
| E2 |
Furnace starts but shuts down quickly; the control board displays E2.
|
Flame Sense Failure / Flame Not Proved | View Details |
| E3 |
Furnace inducer motor runs, but burners do not light; an E3 code is displayed on the control board.
|
Pressure Switch Open / Venting or Inducer Problem | View Details |
| E4 |
Furnace attempts to start but shuts down; an E4 code is displayed on the control board.
|
High Limit Switch Open / Overtemperature | View Details |
| E5 |
Furnace runs briefly then shuts off; an E5 code is displayed on the control board.
|
Rollout Switch Open / Flame Rollout Detected | View Details |
| E6 |
Control board shows E6; blower runs but no heat.
|
Open Limit or Safety Circuit Lockout | View Details |
| E7 |
Furnace does not respond to thermostat; E7 code on control board.
|
Thermostat or Low-Voltage Communication Fault | View Details |
| E8 |
Furnace shows E8 and shuts down; may run blower only.
|
Flame Detected with Gas Off / False Flame Signal | View Details |
| E9 |
Furnace displays E9; inducer may not start.
|
Inducer Motor Fault / Failure to Start | View Details |
| EA |
Furnace shows EA; burners light but shut off after a few seconds.
|
Weak Flame Signal / Intermittent Flame Sensing | View Details |
| EB |
Control board flashes EB; furnace may short-cycle or not start.
|
Line Voltage Polarity or Ground Fault | View Details |
| EC |
Furnace displays EC; blower may run continuously.
|
Control Board Internal Error / EEPROM Fault | View Details |
| ED |
Furnace shows ED; no blower operation in heat mode.
|
Blower Motor Fault / No Indoor Fan | View Details |
| EE |
Furnace flashes EE; unit may not start or may shut down unexpectedly.
|
Ignition Lockout Due to Repeated Failures | View Details |
| F1 |
Furnace control flashes F1; unit may not respond to thermostat.
|
24V Transformer or Low-Voltage Power Fault | View Details |
| F2 |
Furnace flashes F2; inducer and blower may run unexpectedly.
|
Stuck Pressure Switch Closed | View Details |
| F3 |
Furnace flashes F3; burners may light then shut off quickly.
|
Flame Sense Out of Range / Flame Current Error | View Details |
| F4 |
Furnace flashes F4; no ignition, ignitor may not glow.
|
Ignitor Circuit Open | View Details |
| F5 |
Furnace flashes F5; blower runs continuously, no heat.
|
Limit Circuit Open / Continuous Fan Mode | View Details |
| F6 |
Furnace flashes F6; the unit may short-cycle or not complete the heat cycle.
|
Low Flame / Underfire Condition | View Details |
| F7 |
Furnace flashes F7; the unit may lock out after several attempts.
|
Excessive Retries / Recycle Limit Exceeded | View Details |
| F8 |
Furnace flashes F8; the blower may start but the burners do not.
|
Low-Heat / High-Heat Stage Fault (Two-Stage Furnace) | View Details |
| F9 |
Furnace flashes F9; the unit may overheat or shut down unexpectedly.
|
Blower Speed / CFM Configuration Error | View Details |
| – |
Furnace cycles on and off rapidly (every 1–5 minutes) without reaching set temperature
|
Rapid Cycling / Control or Airflow Issue | View Details |
| – |
Furnace frequently trips the household circuit breaker
|
Electrical Overload or Short Circuit | View Details |
| – |
Furnace ignites but produces yellow, flickering, or lifting flames
|
Improper Combustion / Incomplete Burning | View Details |
| – |
Furnace is very loud at the return grille, with strong suction and noise
|
Return Air Restriction / High Static Pressure | View Details |
| – |
Furnace runs but does not produce warm air; the blower is on, and air from the vents is cool.
|
No Heat / Burner Not Firing | View Details |
| – |
Furnace runs but some rooms are too cold while others are too warm
|
Uneven Heating / Air Distribution Problem | View Details |
| – |
Furnace starts but shuts down after 30–60 seconds, blower may or may not start
|
Limit Trip or Flame Loss Shortly After Ignition | View Details |
| – |
Furnace will not start at all; no lights on the control board, no blower or inducer operation.
|
No Power to Furnace | View Details |
| – |
Rust or water stains visible inside the furnace cabinet.
|
Internal Condensate or Humidity Problem | View Details |
| – |
The furnace blower runs continuously even when the thermostat is not calling for heat.
|
Continuous Blower Operation | View Details |
| – |
The furnace causes noticeable vibration or rattling in the ducts and cabinet.
|
Excessive Vibration / Loose Components | View Details |
| – |
The furnace emits a burning smell when it runs.
|
Dust Burn-Off or Overheating Component | View Details |
| – |
The furnace emits a chemical or metallic odor when heating.
|
Contaminated Combustion Air or Overheated Component | View Details |
| – |
The furnace makes a grinding or scraping noise from the blower area.
|
Blower Wheel or Motor Bearing Failure | View Details |
| – |
The furnace makes a loud banging or booming noise at startup.
|
Delayed Ignition / Burner Light-Off Problem | View Details |
| – |
The furnace produces a high-pitched whistling or howling noise during operation.
|
Airflow Restriction / Duct or Filter Noise | View Details |
| – |
The furnace short cycles: it starts, runs for a few minutes, then shuts off and restarts frequently.
|
Short Cycling / Overheating or Control Issue | View Details |
| – |
Thermostat calls for heat but furnace does nothing (no sound, no lights) even though power is present
|
Control Signal Not Reaching Furnace | View Details |
| – |
Water leaking around the base of a high-efficiency Frigidaire furnace.
|
Condensate Leak | View Details |
No matching codes found
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