Goodman Error Code 5: Flame Sensed With Gas Valve Off
LED Blink Pattern
LED blinks 5 times.
How to Fix Goodman Code 5
- Step 1: Turn off the furnace at the thermostat and at the circuit breaker.
- Step 2: Inspect the flame sensor rod for any signs of damage or soot. If it's dirty, clean it gently with a wire brush.
- Step 3: If the issue persists, call a professional HVAC technician to diagnose and repair the problem.
How to Reset Goodman Code 5
- Turn off the furnace power switch, usually located on or near the unit.
- Turn off the circuit breaker for the furnace. Wait 30 seconds.
- Restore power at the breaker and flip the furnace switch back on.
- Set the thermostat to call for heat. If the error code returns after 2-3 ignition attempts, the fault requires repair.
Resetting clears the code from the display but does not fix the underlying fault. If the code returns after reset, proceed to the diagnostic steps above.
What Does Goodman Error Code 5 Mean?
Error code 5 on your Goodman furnace indicates that the flame sensor is detecting a flame when the gas valve is supposed to be off. This could be due to a faulty flame sensor, a stuck gas valve, or a problem with the control board. It's important to address this issue to prevent potential system damage or safety hazards.
Common Causes
- Faulty flame sensor
- Stuck gas valve
- Problem with the control board
- Wiring issue between the flame sensor and control board
Diagnostic Steps
| If... | Check | Expected |
|---|---|---|
| Furnace is not igniting | Flame sensor voltage with gas valve off | 0 volts |
| Furnace is igniting but error code 5 appears | Gas valve operation during ignition sequence | Gas valve should open briefly, then close |
Applicable Goodman Models
Recall Notices
Issued: November 1, 2021
Affected models: Molded plastic evaporator coil drain pans in up-flow condensing gas furnaces
Drain pans can overheat, melt, and deform, posing a fire hazard. Recall expanded January 2024.
Replacement Parts
| Part | OEM Number | Est. Cost | Where to Buy |
|---|---|---|---|
| Flame Sensor | 48T8128 | — | Find Part |
| Gas Valve | 48T8132 | — | Find Part |
| Control Board | 48T8124 | — | Find Part |
Related Codes on Same Models
Other codes that affect the same Goodman model families as 5.
| Code | Description | Severity |
|---|---|---|
| 1 | System Lockout | Warning |
| 2 | Pressure Switch Stuck Closed | Warning |
| 3 | Pressure Switch Stuck Open | Warning |
| 4 | Open High Limit Switch | Warning |
| 6 | Open Rollout Switch | Warning |
| 7 | Low Flame Signal | Warning |
| 8 | Ignitor Error | Warning |
| CONTINUOUS | Reversed Polarity | Warning |
| F01 | Goodman Code F01 - Ignition Lockout | Critical |
| STEADY-ON | Normal Operation | Info |