Goodman Error Code 5: Flame Sensed With Gas Valve Off

Severity: Warning
Type: led blink count
Where to look: sight glass

Warning: Your Goodman furnace has detected a gas valve issue, which could lead to system damage if not addressed promptly.

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.

What does 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.

Affected Models

Recall Notices

Goodman/Daikin Evaporator Coil Drain Pans Recalled Due to Fire Hazard 22-014

Drain pans can overheat, melt, and deform, posing a fire hazard. Recall expanded January 2024.

View official notice

Replacement Parts

Part	OEM Number	Est. Cost
Flame Sensor	48T8128	—
Gas Valve	48T8132	—
Control Board	48T8124	—

Related Codes on Same Models

Code	Description	Severity
STEADY-ON	Normal Operation	Info
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