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Daikin Furnace Troubleshooting Flow Chart

Is your furnace... The problem might be your... What's wrong? How you can fix it:
Not heating? Fuse or Circuit Breaker The electrical system that provides power to your furnace has either shorted or blown the power switch. Reset your Keeprite furnace’s circuit breaker. If it is blown, you’ll have to replace it.
Igniter The furnace’s igniter is likely cracked or faulty. Check if the part has cracks and replace the igniter if it does. If it doesn’t, use a multimeter to test for continuity.
Cycling irregularly? Thermostat Your furnace’s thermostat may be adjusting incorrectly. If the thermostat has an adjustable calibration scale, you can adjust the heat anticipator. If this does not address the cycling or you don’t have a scale, you may have to replace the thermostat.
Not blowing hot air? Blower Motor The blower motor could have burnt out. If this isn’t the case, then the connecting belt could be broken. Check to see if power is going to the motor. If it is, but nothing is working, the motor is likely dead and needs to be replaced. If the motor runs but air doesn’t move, the connecting belt has probably broken and should be replaced.
Blowing too much air? Control Board If the relay that regulates the blower motor on the control board has stopped, it will continually send voltage to the motor. Replace the control board.
Thermostat The contact that controls the blower motor on your thermostat may be stuck shut. This results in the blower motor to run constantly. Use a multimeter to check for continuity. If the problem is the thermostat, replace it.
Starting and then stopping shortly after? Flame Sensor Your furnace’s flame sensor checks if a flame is present. If it's defective or there's debris, it won't be able to detect a flame. If dirty, carefully clean the sensor using a fine abrasive pad. If still not working, replace the flame sensor.
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