Sometimes, if the flame sensor is dirty, it will fail to detect a flame. Try cleaning the flame sensor with a fine abrasive pad. If the furnace still doesn’t heat, replace the flame sensor. The draft inducer motor draws air into the heat exchanger and then exhausts it out the flue.

Why does my heat not work sometimes?

Dirty and clogged filters are one of the primary causes of furnace problems and can cause high operating costs. The heat exchanger can overheat and shut off quickly when filters are clogged with dust and dirt. This also causes soot buildup on the heat exchanger, which makes your furnace run less efficiently.

Why is my Goodman furnace not blowing heat?





When you find your furnace not blowing hot air, a common cause can be a clogged air filter. Air filters screen out dust and other particles before the furnace’s heated air is blown throughout the house. Consequently, they can get clogged over time, making your furnace run longer until it overheats.

Why does my furnace only kick on sometimes?

If your furnace shuts off too often, you could have a corroded or dirty flame sensor. A flame sensor lets your system know there’s a flame when the gas valve is open. If there isn’t a flame, the sensor will shut off the gas valve to keep the gas from getting into your house.

Why is my furnace running but no heat is coming out?

Dirty filters are the most common cause of furnace problems. Dust and dirt restrict airflow—and if the filter gets too clogged, the heat exchanger will overheat and shut off too quickly, and your house won’t warm up. If the blower is running but no heat is coming out, replace the filter.

How do you reset a Goodman heater?

How to reset a Goodman furnace through the thermostat

  1. Step 1: Locate the thermostat. …
  2. Step 2: Turn off the thermostat. …
  3. Step 3: Remove the cover of the thermostat. …
  4. Step 4: Locate the reset button. …
  5. Step 5: Press and hold the reset button. …
  6. Step 6: Release the reset button.





Does a Goodman gas furnace have a reset button?

The exact location of the reset button will vary by model on each Goodman furnace. However, you will need to open up the front panel of the furnace to access it. In many furnaces, the switch will be located in the air handlers compartment next to the blower motor (it will typically be a yellow or red button).

Why is my furnace blowing cold air on heat?

If your furnace is blowing cold air in your home, this is a sign of an issue with the flame detector, gas supply, air filter, pilot light, or condensate lines. Many of these issues are able to be easily solved on your own by sanitizing or replacing components in the gas furnace.

Why is cold air coming out of my vents when the heat is on?

This issue could be caused by an improper thermostat setting. Check that the fan blower switch is set to “auto” and not “on.” When the “auto” setting is chosen, the fan will only run during a heating cycle and won’t push air that feels cooler through the vents in between cycles.

Why does my heat stop working at night?



Short-cycling: If you notice the furnace shuts off regularly at night, it may be short-cycling. This happens when the furnace is too large for your home. If your furnace is short-cycling, it will turn on for a short period, then turn right off. This prevents it from heating your home properly.

Does a Goodman heat pump have a reset button?

Generally, the reset button of the Goodman AC unit is located on the outdoor unit, especially where tubing is done on the unit. There may be chances of this high-pressure switch tripping when hot, so it is advised to look for any dirt or grime clogging the coil.

Where is the reset button on a Goodman?

Where Is It? The reset button on a Goodman air conditioning system should be on the outdoor air conditioning unit close to where the tubing is welded on the AC system. This is a high-pressure switch that trips if the air conditioning unit gets heated, so assess and inspect the coil for dirt, etc.

Where is the limit switch located on a Goodman furnace?



The switch is usually located above the heat exchanger of the furnace in the hot-air supply room.

How do I know if my limit switch is bad?

Limit Switch Malfunctions



One common symptom of a malfunctioning limit switch is a blower fan that doesn’t shut off. This happens when the switch fails to shut off after the burners have stopped and the air exchanger is sufficiently cool. A bad switch also can prevent a furnace from operating at all.

How do you test a Goodman limit switch?

Quote from the video:
Quote from Youtube video: To test the component. You can disconnect the wires. And check the resistance value across the contacts to see if it's open right now this switch is closed. And we read 0.0 ohms of resistance.

What does a furnace limit switch look like?

Quote from the video:
Quote from Youtube video: The limit switch monitors the temperature of the air passing over the heat exchanger.

How do I reset the limit switch on a Goodman furnace?



Press and hold the red “Reset” button in the center of the rollout limit switch component. Hold the button for one to two seconds before releasing it.

How do you reset the limit switch on a furnace?

If your limit switches trips repeatedly, it can enter a lockdown mode. That is, it shuts down completely. You can try resetting the furnace limit switch yourself if you have a newer model by turning off the furnace for 30 seconds and then turning it back on.