I was called on a svc call yesterday to a trailer. Nordyne air handler with heat strips.
Anyway my cust said he coulkd smell a burning smell from the blower section.
I Started the unit up and saw spark flying out the back of the motor.
Replaced blower motor and run cap.
later realized the spark was coming out of the capacitor.
I got called back today because he said it was doing the same thing. I found the run cap to be black around the terminals, and the electrical tape i had around the terminal were melted.
what is going on?
noticed the blower relay. when I had the unit in cooling, the relay was 0V acroos cooling terminals and 50V (weird!!!) across heating terminals.
switched to heating, had OV across heating terminals and 45V(weird) accross cooling terminals.
why would the capacitor spark?
thanks for any help