my a/c on my motorhome freezes up after running a few hours and no mater what the thermastat is set it makes a humming noise til i kill it at the breaker.. and advice would be a great deal of help.. thanks guys, adam
my roof top a/c will run for a few hours then it just starts humming. i tried putting it to fan only and all it does is hum. i believe its a duratherm. any advice.thank you. adam
