My mom's heat in her mobile home isn't working. She has an Intertherm feh-015ha inside furnace. Furnace will only turn off at breaker. Blower not working. Any idea where I should start looking?

The starter board controls everything. Pull it out, find a replacemeny on the internet. Make sure the power is off.

Avery, if the breaker is properly sized, there is something in the circuit that is causing higher than normal resistance such as possibly loose connections on one end or the other. Check the 'minimum circuit ampacity' (for circuit A and possibly circuit B) on the heater tag and make sure the correct size breaker has been installed. That should be a 15 kw furnace and could either be a dual circuit or a single circuit heat strip. Fifteen kw correlates to approximately 60 amps at 240 volts.

TURN OFF THE POWER and check the connections inside the furnace terminal block for discoloration and tightness. If its a dual circuit, there will be two breakers to turn off. Check to see if it is a dual circuit and if so, see if someone has paralleled those two circuits together inside the furnace. If so, you have to make sure the appropriate single circuit wire and single breaker has been installed.

It is usually recommended to run the separate circuits to the furnace instead of paralleling them together.

Good luck and whatever you do...BE SAFE ABOUT IT .

You most likely have a bad fan limit / cycling switch. If you kill the power to the furnace see if you can trace the wires from the motor to where the connect to the switch. It looks like a round button with tabs sticking out of it for the wires to connect. Mark down where the wires were connected and take it to a HVAC business or furnace supply house. Be sure to have the model off the furnace with you so you can get the correct parts.

either the heat strips, fusible links on elements or sequencers.

Furnace burner and heat element are not the same. I think the fan time delay, a sensor that turns the fan on when this sensor senses heat, is shot and needs replacing, for a furnace type heat ( gas heat)

I would suspect your evaporative motor (located in the furnace) is shorted.
To prove it - just disconnect the electrical wires to the motor and turn the breaker back on.
Most likely the breaker will stay on - which will tell you for sure that the motor is shorted.
Note: it's possible that the capacitor on your motor is shorted - but I doubt it. i would bet on the motor. In any event - you have a 'direct short' which is causing your breaker to pop, and I would bet it's the motor.
If it isn't the motor you will just need to find the 'short' to keep the breaker from popping.

You could possibly have a bad sequencer. Turn off the power and check the normally open connections with an ohmmeter. If they are not open then it is bad.

Best things to do is find your Return grill in the home.
Get a measuring tape and measure the Hole size with the grill removed, Or filterback grill whatever the case.
Then simply go to a home retailer with the size, or in rare cases you may want to consider a Hogs hair washable filter that can be cut to size, to fit it perfectly.

I’m happy to help further over the phone at https://www.6ya.com/expert/michael_341f3f9dee622e54

If your blower will not shut off from the thermostat, you either have a bad thermostat or your red and green thermostat wires are exposed to each other.

Sounds like a downflow electric furnace? If so it sounds like you have 15kw worth of electric heat, you might have a defective heating sequencer, witch is what they call a dual on one plate.