Table of contents
Please note, the following Goodman Repair guide is for informational purposes only. Any servicing you attempt is at your own risk.
➤ A complete Goodman furnace repair guide, from how to replace your air filter, to troubleshooting and error codes, model numbers and more!
Goodman At a Glance
Founded in 1975 by Harold V. Goodman, the Goodman Manufacturing Company has grown into one of the biggest names in home heating and comfort. This comprehensive Goodman furnace repair guide will help you troubleshoot any problems that your own Goodman furnace might begin to experience.
If the internal components of your furnace are operating properly, then your whole system will be able to deliver long-term comfort. By replacing your air filter regularly, you’ll be able to maintain a consistent performance from your Goodman furnace.
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.
Goodman Furnace Repair Guide
What’s Wrong With Your Furnace?
Common Furnace Problems and Troubleshooting
Before opening up your Goodman furnace to identify any issues, always remember to shut off the power completely.
| 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. |
Goodman Furnace Error Codes
| Error Code | What this means | How to fix it |
|---|---|---|
| Single LED flash, steadily on | This means your Goodman furnace has no signal coming from the thermostat and won't operate. | You should check your thermostat for an improper setting or connection. |
| Single LED flash, blinks on and off | This means that your furnace has locked out due to too many ignition attempts. | After one hour of lockout, your furnace will automatically reset itself. |
| Two LED flashes | This means that the draft blower isn't functioning properly, or your furnace has a short in the pressure switch circuit. | You should either repair the short or replace the pressure switch. |
| Three LED flashes | This means your furnace has an open pressure switch circuit or the induced draft blower is operating when it shouldn't be. | You should check the pressure switch hose for blocks or an improper connection. Otherwise, see if any loose wiring needs tightening. |
| Four LED flashes | This means your furnace has a primary open limit circuit. | You should check and clean all the filters, tighten the wiring, and see if there are any blockages in the flue. |
| Five LED flashes | This means that your furnace senses a flame without a call for heat. | You should check for a leaky or open gas valve or a lingering burner flame. |
| Seven LED flashes | This warns of a low flame sense microamp signal. This is the result of a coated flame sensor or a lazy flame due to poor gas pressure. | Adjust the gas pressure according to the information available to you. |
| Eight LED flashes | This means your furnace has an igniter circuit problem due to a defective igniter or an improperly connected igniter. | Replace the igniter or check the ground wiring for defects. |
| Nine LED flashes | This means that your furnace has a high-stage pressure switch that won't close during a high-stage-induced draft blower operation. | Check your Goodman furnace for a pinched or blocked pressure switch hose. |
| Continuous LED flashes | This means that your furnace has a reversed polarity of 115 volts. | You will have to correct the wiring polarity after reviewing the wiring diagram. |
When to call a professional to repair your Goodman furnace
By following this Goodman furnace repair guide, you’ll be able to identify and fix most simple issues with your Goodman furnace. However, it’s more beneficial to contact an experienced and certified HVAC technician for certain complex problems.
If you notice that your furnace is no longer producing heat, has begun to leak or drip, or is producing strange noises, you should contact a trained professional. These symptoms typically indicate a broken internal component and require an HVAC technician.
Who Should You Call?
When your Goodman furnace begins to struggle, an excellent place to begin looking for a trained HVAC technician is online. Consumer reviews can effectively give you information related to the services available as well as their pricing.
It’s important for Canadian homeowners to note that not all online consumer reviews are trustworthy. You shouldn’t make an expensive investment based solely on an anonymous review, so where can you find reliable information? We can help!
Our own independent certification program can help you find a local heating and cooling professional to service your Goodman furnace. We aim to connect Canadian homeowners with trustworthy local HVAC companies so that you can get the best service possible.
Goodman’s Warranty Coverage
One area that Goodman exceeds expectations is in their comprehensive warranty coverage. For their entire selection of economy, mid-range and premium models, Goodman offers the same high-end warranty to protect your investment adequately.
This includes a limited lifetime warranty on the heat exchanger as well as a limited 10-year warranty on parts. While mid-range and premium-tier furnaces also include a limited 10-year unit replacement warranty to cover any defections. Also, remember to check if the company who installed your furnace offers any warranty as well. They might provide coverage for labour or other services.
Protect your Goodman furnace: Register and access your Goodman furnace warranty here
