HVAC question
On a combo electric heat and a/c unit, what would be the purpose of a "evaporator motor"?
Down here the mobile homes are often equipped with an outside only unit that sits next to the house. It contains both the a/c cooling equipment and the electric resistant heating unit.
there is a 16" flexible insulated duct for the conditioned air and another for the return air.
This morning we switched it over to heat to take the overnight chill out of the house. It started to blow cool air but after a minute of blowing cold air it shut off. Digital thermostat just clicked twice every 30 seconds.
Turned breakers off for a few and tried again.
Thermostat just clicked again twice every 30 seconds.
I took the side panel off the outside unit, looking it over I discovered a disconnected yellow wire. Per the schematic it appears the wire should be connected to the contactor above it.
The schematic shows two yellow wires going from the same contactor terminal to what is called an "evaporator motor".
We had heat last winter but maybe that wire was not on good enough (push-on blade). Or a mouse decided to get in and play jungle jim.
Anyways I can see the power connections for the heating elements are very corroded. And inside the casing was dewy wet.
I am thinking the "evaporator motor" is to blow air thru the cabinet every so often to keep the heating unit at least moisture free and thus prevent corrosion??
Maybe, maybe not.
I reconnected the yellow wire and the results were "no change".
Maybe, maybe not.
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