First check if the blower motor is working by select "FAN ON" on the thermostat. Also test in cooling mode.
If you have a digital stat they don't have heat anticipators, so that shouldn't be it. Does your unit have an ignitor or is it a pilot light system? If it has an ignitor how long do the burners stay lit before turning off? If it's less than 10 seconds your problem is likely a bad flame sensor.Hi, I hope you guys can help me out.
My furnace works fine first thing in the morning or when it isn't used for a few hours. After the first use, when it turns on again, the burner ignite, and after a few seconds, as soon as then flowers turn on, the burners shuts off. Anyone know what I can replace, or check? Can it be the thermostat?
Thanks in advance for any help.