First time posting, and I need some help.

For the last three weeks my wife had noticed that sometimes the heater would not kick on. By the time I came home to check, the heater was working.

The house got cold about 2 this morning, and the heater would not click on. I moved the tab and heard it click, but nothing else.

I switch it back and forth from heater and air conditioning, thinking it might have stuck. That didn't work. I noticed that when I pushed the switch for the fan, the fan came on.

The unit is about twenty years old. What would I check next? Could it be the thermostat going bad? My email is [email protected]

Thanks

Hi, Mitch,
Until someone answers with specific info on how to "do it yourself", my suggestion is to call the repair person.
There is probably a bad solenoid switch (or starter) for the heat. It could also be in the thermostat. I assume this is a heat pump.
Best wishes, and good luck.

Not a heat pump, unit is in a mobile home. Would like to comment on your post, but where?:cool

You could freeze to death waiting for a repairman. Either at the thermostat, or at the heater, connect the red and white wires. That is all the thermostat does when you need heat. If the heater starts a cycle, the thermostat is the problem. If not, you need to check for 24 volts between the red wire and the blue one that runs out to the A/C. If you have a fan on setting, if it works, that is an easy check for power. If you don't have 24 volts, a fuse for the transformer is bad or the transformer itself is. They are common, cheap, and easy enough to replace.

If you have power, and connecting the wires didn't work, is anything happening? My furnace does a sequence of a small blower starts, the ignitor comes on, the gas comes on, and finally the main blower comes on. There are sensors that shut the gas off if anything else fails. Post back. If you don't get it going, let me know what you find. Also, if you have a fan on setting, let me know if it works.