5. Check for Furnace Error Codes
If malfunctions persist, take a look inside the plastic window of your furnace to view the motor. Depending on the model, the error code light could be mounted on the outside of the furnace instead.
If there’s anything but a steady, colored light or green, blinking light, call us at 469-505-0525 for service. The furnace’s error code might require professional help, and there’s no one better to handle the job. We back our work with a guarantee*.
6. Clean the Flame Sensor
If your furnace starts for a while, but turns off without giving off any heat, a dirty flame sensor could be to blame. If this happens, the furnace will try to start three times before a safety setting will shut it down for an hour.
If you’re comfortable opening up your furnace and cleaning the flame sensor, here are the steps to take, or you can call us at 469-505-0525 to have a professional take a look:
Here are the supplies you’ll need to clean the sensor:
- A 1/4 “ hex screwdriver or wrench
- Light grit sandpaper, steel wool or emery cloth
- Dry, clean paper towels.
Once you have the correct supplies:
- Turn off the power via the wall switch or breaker. If the gas valve isn’t electric, you’ll need to shut off the gas as well.
- Remove the front panel of your furnace and follow the wires to the flame sensor.
- Unscrew the rod and use the abrasive wool or sandpaper to rub the metal rod.
- Wipe it down with a clean paper towel.
- Remount the sensor.
- Turn on the furnace after closing the doors. It may take several minutes to perform safety checks before the furnace returns to normal function. If it still doesn’t start, the sensor may be broken, or there’s another problem. If that’s the case, call us at 469-505-0525 and let the experts at Diamond Blue Air take a look.