Duo Therm A/C Troubleshooting - non op fan
Model 57915.741 Dometic A/C 3107610.002 thermostat? After about 5 weeks of non use in the Florida heat, tried to turn on A/C, compressor ran but not fan- selected fan from "auto" to "on" and blew...
Forum Discussion
j-d wrote:eHoefler wrote:
The capacitor is for the compressor, not the fan. Chances are the fan has a bad bearing and is not spinning freely.
Untrue and True!
Untrue: The FAN does use a Capacitor. It's a RUN Capacitor only. Compressor uses a RUN Capacitor as well, and in addition it MAY have a START Capacitor.
So, Always RUN Capacitors, for BOTH "motors" (Fan and Compressor). Some A/C's use two separate Capacitors, but many such appliances use a Two-in-One Capacitor. Usually around 05 mfd for Fan and about 35 mfd for Compressor. Easy to tell. The two-in-one will have three sets of connections. Singles will have only tow per capacitor.
Then IF there's a Start Capacitor, it is connected across ONLY the Compressor Capacitor (or that part of a two-in-one).
TRUE: Heartily agree the Fan Motor Bearings could be sticky, so the idea of rolling it over by hand to check, is a very good one. Those fan motors have very, very, little starting torque. Doesn't take much to keep them from being able to spin up.
If everyone answered incorrect replies like this and supplied the correct info in a classy manner like you did, this forum would be so much more pleasant. Thanks.
