I have a Coleman electric furnace mo#3400A818. In the heating mode the element engage but the fan never starts and they shut down on high limit. I can turn the fan on cont. at the stat. and it will blow on high speed. I'm guessing it's the fan switch but not sure of it's location.

The sequenser is a relay type part that sends the signal to fan and elements to come on

Is this in a Mobile home?