Question about Heating & Cooling
The fuse generally blows out when the system is either overloaded or there is a short circuit (another name for overload). Since there are no shorting indicators (smell and smoke) means the system is fine and it runs too for a short while, try using a higher value fuse/breaker.
Posted on Oct 11, 2010
I couldn't find a speck of a schematic on the net, but I have a guess as to what's going on. Obviously, for the unit to be popping the 20A breaker, there's a serious current pull, and the most likely component that I can think of on the unit would be the fan. It sounds like the fan motor was slightly shorted, drawing current for a few minutes, before "melting down" the laminate covering on it's windings, and culminating into a full blown short.
What you can try to do is to disconnect the motor, and see if the unit runs for a few seconds, at least. That would indicate a bad fan motor.
I'll check a few nebulous sites that have helped in the past later today, and get back with you if I find something on the wiring.
Hope this helps.
Posted on Oct 10, 2010
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Posted on Jan 02, 2017
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