Goodman Furnace Troubleshooting Basics - Common Problems and the Solutions

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Last updated: 
January 5, 2022

Why You Might Need Goodman Furnace Troubleshooting

Understanding common Goodman furnace issues and their causes can help you troubleshoot your furnace before calling a professional. Some simple tasks, such as checking the thermostat settings, power supply, air filter, gas valve, and chimney, can be performed by homeowners . However, more complex issues should be handled by a skilled technician.

Tools and Specs to Keep in Mind

The tools needed for furnace maintenance depend on the task. For basic cleaning, you may need a toothbrush, vacuum, scrub brush, cotton swabs, toothpicks, rags, and a replacement filter . Professional HVAC technicians use a variety of tools, including hammers, cordless drills, saws, tape measures, screwdrivers, wire cutters, and pipe wrenches . However, average homeowners should not attempt complex repairs due to the potential dangers of working with high voltage and furnace ventilation issues, which cause over 200 deaths in the United States each year .

How to Check the Thermostat and Furnace

Before assuming a furnace issue, check the thermostat for a jumbled digital display, low batteries, or incorrect temperature settings. Loose or touching wires may also cause problems .

To test the thermostat:

  1. Remove the furnace doors and locate the circuit board.
  2. Disconnect the wires from the "W" and "R" terminals.
  3. Connect a jumper wire between the R and W terminals.
  4. Secure the furnace door and check if the furnace works.

If the furnace works, the thermostat is likely malfunctioning and needs to be replaced. If the issue persists, check the power supply to the furnace. If there is no power, contact an electrician, as working with high voltage can be dangerous .

Caution Notes

Regular cleaning and maintenance can extend the life of your furnace. However, homeowners should not attempt complex tasks, such as adjusting gas burners, as improper adjustments can cause flash fires . When in doubt, always call an HVAC professional to ensure safe and proper repairs.


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  2. "How to Clean a Furnace: DIY Furnace Maintenance." The Spruce,
  3. "HVAC Tools List: 26 Essential Tools Used by the Pros." HVAC Training 101,
  4. "Gas appliances carbon monoxide poisoning deaths down 37% from 1999-2012.",

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