Goodman At a Glance
Goodman Furnace Repair Guide
Common Furnace Problems and Troubleshooting
| Is your furnace... | The problem might be your... | What's wrong? | How you can fix it: |
|---|---|---|---|
| Not heating? | Circuit Breaker/Fuse | Then either the circuit breaker has shorted, or the unit's fuse has blown completely. | You'll have to reset the circuit breaker that connects to your furnace. If this doesn't help, then it's likely the fuse has blown, and you'll have to replace it. |
| Igniter | The igniter is either defective or cracked. | You should locate the igniter within your Goodman furnace and check the part for cracks. If it's cracked then replace the part, but it isn't then you'll have to test it with a multimeter for continuity to see if it's defective. | |
| Cycling irregularly? | Thermostat | Your thermostat might be adjusting incorrectly. | If your thermostat has an adjustable calibration scale, use this to adjust the heat anticipator. However, if this doesn't appear to work or you don't have a scale, you should replace the thermostat altogether. |
| Not blowing hot air? | Blower Motor | Your furnace's blower motor has either burnt itself out, or the connecting belt has snapped. | You should check to see if power is reaching the motor. If it does but the motor isn't running, then the blower motor has failed. Alternatively, if the motor does run, but the air still doesn't move, then the connecting belt has snapped. Either replace the motor or belt depending on the situation. |
| Blowing too much air? | Control Board | The relay on your control board that regulates the voltage sent to the blower motor has failed. | Should this occur, you'll have to replace the control board entirely. |
| Thermostat | The contact on your thermostat that controls the blower motor is closed. | You should use a multimeter to check for continuity. If the thermostat is functioning improperly, replace it altogether. | |
| Starting and then stopping shortly after? | Flame Sensor | Your furnace uses a flame sensor to detect if a flame is present. If this sensor is defective or dirty, it will be unable to detect a flame. | You should use a fine abrasive pad to clean the sensor if it's dirty. Otherwise, you can replace the flame sensor entirely. |
How to Replace Your Air Filter
- Open the access door on your Goodman furnace by pulling it towards you, revealing the filter inside.
- Carefully remove the filter by hand.
- Vacuum any dust or debris that may have accumulated on the filter housing of the furnace.
- Slide in the replacement filter. Make sure that it’s in the same position as the previous filter.
- Replace the access door on your Goodman furnace.
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Goodman Furnace Error Codes
| Error Code | What this means | How to fix it |
|---|---|---|
| LED flashing like a heartbeat | Control has 24 VAC power | N/A |
| Two LED flashes | Unit’s pressure switch didn’t open | Check for an obstruction in the pressure tubing |
| Three LED flashes | Unit’s pressure switch didn’t close or reopened | Check for: excessive wind; if it’s the proper vent size; defective inducer motor; defective pressure switch; inadequate combustion air supply; disconnected or obstructed pressure tubing; or restricted vent |
| Four LED flashes | Limit circuit fault: either a limit or flame rollout is open | Check for: restricted vent; loose blower wheel; excessive wind; dirty air filter; or defective blower |
| Five LED flashes | An abnormal flame proving signal, the flame is likely proved while the gas valve is de-energized | Check for a leaky gas valve or a gas valve that is stuck open |
| Six LED flashes | Failure to ignite or the flame sensor was lost while running | Check for: an ungrounded flame sensor; defective hot surface ignitor; control ground continuity; inadequate flame carryover; or rough ignition |
| Six LED flashes | Failure to ignite or the flame sensor was lost while running | Check for: an ungrounded flame sensor; defective hot surface ignitor; control ground continuity; inadequate flame carryover; or rough ignition |
| Seven LED flashes | Limit circuit lockout | A lockout will occur if the limit or flame rollout is open for longer than 3 minutes. Control will auto-reset after 3 hours. |
| Eight LED flashes | Gas heating lockout, control won’t auto-reset | Check for a miswired gas valve or a defective control valve |
| Ten LED flashes | Polarity is reversed | Review instructions to correct polarity |
| 1 + 2 | Blower is on after power up | Occurs if the unit is powered up during a call for heat or opens while the blower is on delay |
| 6 + 1 | Ignition lockout | Control will auto-reset after 3 hours |
| LED is off | Secondary voltage fuse is open | Check whether the door switch isn’t closed or for a short circuit |
| LED is on | Control circuitry lockout | Will auto-reset after 1 hour |
| LED is solid | Gas valve relay is stuck while open, flame sense circuit failure, or software-check error | Reset power to clear the lockout and then replace control if status code repeats itself |
When to call a professional to repair your Goodman furnace
Who Should You Call?
Goodman’s Warranty Coverage
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