Is there an aftermarket climate control module that can be installed in older tractors to regulate the heat, the knob seems to always needs adjusting in this weather, either too hot in the cab or too cold, if by some stroke of luck you get it right and the load on the engine changes then it cools off again. I'm talking about a 88 series IH tractors, but if one is available it would be nice for the combine also.

Don't know anything about these things so forgive me if this is a stupid question, they have been in cars for years could those be adapted?