Quote:
Originally Posted by retiredguy123
I understand your point, but the air handler is just a fan. Wouldn't the same logic also apply to more expensive items, such as the water heater and the refrigerator?
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There is some electronics in the air handler. There is an electronic motor controller device in the fan motor housing and mine failed when the former owner got a power surge. It was never noticed because it only effected the system when the Aux Heat was engaged. I found the problem when I bought the house and tested the HVAC heating. Also, your thermostat runs off of the air handler power so that can be affected by a surge as well.