Central Electric Furnace EB17A

[dulinaa]

Great website! Just bought a 1994 Crimson two weeks ago, I just noticed on a cold snap here in Jax,FL that my heat will not come on in the Auto mode but works if I manual turn the fan on at the thermo. A/C side works like its supposed to in Auto. If i need heat, i have to go to the thermo and turn it on, and back off. I check the thermostat for any possible problems, but all looks good. Pulled cover off unit and nothing obvious. the wire diagram for the unit shows this has a four speed blower motor and only uses two. High speed for cooling, and med-lo for heating. I don't know if the heating element is energized with heat in auto mode. I am hoping for any thoughts and possible remedies before I grab my DVOM and tear into it.
Thanx
A.J.

[Robert]

Hi AJ,

Sorry for delay. Cooling mode auto and fan on and heat mode fan on all use high speed through fan relay.


Heat-auto uses sequencer for controlling blower motor.


Probably a bad sequencer # 3115-3571 on right side here:

http://www.mobilehomerepair.com/ColemanElec.html



Thanks,
Robert