Neep help adding a thermostat to the Clayton furnce.

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Woodenator

New Member
Jul 9, 2024
59
Pa
Hey fellas this year I want to wire the Clayton on its own thermostat. Now I run my furnace with everything done manually. Usually when the furnace has reached operating temperature I plug both big fans on the unit in. Then I plug in my 2 inline duct fans in, without them it simply doesn't put out enough flow and my ducts get really hot. All the fans run constantly until i unplug them when the fire goes out or the house starts to overheat, which is often. Anyway, I was told last year to wire in a snap switch between the power coming in and the motors, everything connected to a thermostat. That way, when the house reaches a certain temperature, it will kick off the big fans and will leave the 2 inline duct fans still running. I am just looking for a way to make this thing less of a pain that doesn't require buying a new furnace. It's late and I can't sleep so I hope this all made sense.
 
I have a Clayton 1602M and it has a temp switch on the back of the plenum. There is also a switch to choose between one or both fans coming on. It is easy to add this, but will not use the room temperature to turn the fans on and off. Instead it uses the furnace temperature. You could also use two different temp sensors (say a 120 and 140) to turn on one fan and then the other. That is a mod I plan on doing soon. This would be the part you need:

Temp Sensor