To reset a Goodman furnace, start by cutting electrical power at the shutoff switch or breaker panel for 5 minutes, then turn it back on. Most modern units don’t have a dedicated red reset button, so power cycling resets the internal control board and clears minor lockout codes quickly.
A safety lockout causes the furnace to stop running when a sensor detects high heat, poor venting, or ignition failure. If the underlying mechanical problem remains, the control board will simply lock out again after you cycle the power.
This guide isn’t for older oil-burning heaters or damaged gas setups. If you smell natural gas near the cabinet, don’t touch the switches; leave your home right away and call your gas utility.
Steps to Reset Your Goodman Furnace
- Lower your wall thermostat setting at least 5 degrees below the current room temperature so it stops calling for heat.
- Flip the electrical switch on or next to the furnace cabinet to the Off position.
- Turn off the dedicated heating circuit breaker inside your main electrical panel for a full 5 minutes. Tip: Don’t rush this step, because the internal capacitors need time to fully drain and clear the system’s circuit board memory.
- Flip the breaker switch back to On, then turn the furnace cabinet power switch back On.
- Inspect the small flame rollout switches near the burner assembly; if a small manual button between the wire terminals has popped outward, gently press it down until it clicks. Tip: A tripped rollout switch signals trapped fire or combustion rollout, which requires an immediate inspection from an HVAC professional if it trips a second time.
- Raise the thermostat setting at least 5 degrees above room temperature to start a new heating cycle.
Testing electrical parts inside the cabinet with a multimeter, bypassing switches, or touching internal high-voltage wiring requires a licensed HVAC technician or electrician.
How Long It Takes
Resetting the appliance takes roughly 5 to 10 minutes from shutting off the breaker to feeling warm air from the registers.
| Situation | How long | What changes it | What to watch for |
|---|---|---|---|
| Soft system lockout | 5 to 7 minutes | Control board capacitor discharge rate | Steady green or amber light on board |
| Tripped manual rollout switch | 6 to 8 minutes | Time spent removing upper service panel | Burn marks or soot around burners |
| Hard system lockout | 1 to 3 hours | Board auto-clear delay timer | Rapidly blinking red status LED |
If your system runs for longer than 10 minutes without blowing hot air, the unit has likely returned to a safety lockout.
How to Tell When It’s Done
A successful reset produces a distinct startup sequence within 90 seconds of calling for heat. You’ll hear the draft inducer fan turn on, followed by the clicking sound or glow of the igniter, and finally the gentle roar of burning gas.
Look through the sight glass on the blower door to read the internal diagnostic light. If the light blinks a repeating code instead of staying solid, read the diagnostic chart pasted inside the blower access panel. The trade-off of clearing the board this way is that you wipe the immediate error code history. When the heating equipment still won’t fire, contact a technician certified through North American Technician Excellence to properly diagnose the ignition failure.
Mistakes That Ruin It
- Pressing a rollout switch repeatedly: The switch trips to prevent cabinet fires from backdrafting flames, so forcing it down repeatedly can melt wiring or crack the heat exchanger. Press it only once, and call a professional if it pops out again.
- Skipping the air filter inspection: A completely clogged filter restricts airflow and trips high-limit switches within minutes of a reset, costing you extra money in unneeded service calls. Slide a fresh filter into the rack before you restore main power.
- Leaving the cabinet access door loose: Modern cabinets use a safety kill switch that cuts all power if the door is open. Make sure the blower panel sits flush in its frame or the furnace will stay completely dead.
Can You Reset the Furnace Without Turning Off the Breaker?
Yes, you can flip the power toggle switch mounted on the outside of the furnace cabinet. If your unit lacks an external switch, turning off the breaker is required. Leave power off for 5 minutes so the board fully clears its memory before turning it on.
Why Does My Heater Keep Shutting Off After a Reset?
Your system is overheating or failing to sense the burner flame. A dirty flame sensor rod or a heavily clogged air filter will trigger a shutdown after a few seconds of ignition. Replace your air filter first, and have a technician clean the flame sensor if cycling continues.
Where Is the Reset Button on a Goodman Unit?
Most modern models don’t have a single red push button on the outside. Instead, manual reset buttons sit on the small rollout limit switches near the burner compartment. If those are depressed, power cycling the main electrical switch serves as your reset.
Is It Safe to Reset the System Multiple Times?
No, you shouldn’t cycle the power more than twice in one day. Repeatedly resetting a malfunctioning furnace can pump unburned gas into the flue or cause the heat exchanger to crack from excess heat. Call a licensed technician if one reset fails to resolve the problem.
What Happens If the Status Light Blinks Rapidly?
A blinking diagnostic LED indicates a specific system fault code, such as an open limit circuit or pressure switch error. Count the number of flashes between pauses. Match that count against the factory reference chart on the inside of the lower access panel to find the fault.
