Hi Janet and Fred
Glad summer is treating you well, just the repairs ……
The AC, well this much I know, but have no idea if it is your problem.
This is from commercial cold storages, but I would believe apply here as well.
If the fan runs, then that is ˝ the battle. It means the control board is at least 1/2 working right.
Next is the compressor. In order to get any cooling, the compressor has to run. It compresses the Freon (R22)gas that makes the cold. When the compressor short cycles, on and off and on and off, it is trying to run but something is shutting it back down. Now what?
This may be the simple correction. See this excerpt from the Dometic AC service manual
C22a. Ambient Temperature
Running the air conditioner or heat pump at a temperature
below 75 degrees Fahrenheit may cause the inside coil
(evaporator) to freeze up in the cooling mode. The most
common time for this to occur is at night. Even after the
ambient temperature has gone up, the coils will remain frozen.
To assist the defrosting of the coil, turn the air conditioner
to HI FAN mode; set the temperature selector to a
higher setting and let the air conditioner or heat pump fan
run until the coils are defrosted.
Takes a while to open, it is 127 pages
If the AC evaporator coil, ( the one inside up in the ceiling above the plastic ceiling grate and mesh filter) freezes up, then it can start and stop the compressor I do believe. It does on cold storage units that is for sure. If you run the system on low, it can at times freeze up at night as the fan is not running enough to defrost the unit. As they say above, turn the fan on manual (HI) and let it blow thru the unit to defrost it. Then start as normal. How long? Well maybe 30 minutes plus. If you hear water running across the roof during this time, then for sure you where froze up.
On the cold storage units we use to have, we had electric heaters inside the coils to burn out the frost. These small RV AC units have a freeze up switch on the evaporator coil that shuts down the compressor when you approach the freeze up state. Then the blower runs to defrost it.
If this helps, then that was the simple fix. If it does not, then it may be more complex and your compressor start capacitor may have a problem or the compressor it self.
We have a AC guru person here on the forum who works on AC systems all the time. Rich something I think. But I have not seem him post now in a while and I do not remember his screen name. I think he has his Sunline parked on a permanent spot.
Hope this helps
Current Sunlines: 2004 T310SR, 2004 T1950, 2004 T2475, 2007 T2499, 2004 T317SR
Prior Sunlines: 2004 T2499 - Fern Blue
2005 Ford F350 Lariat, 6.8L V10 W/ 4.10 rear axle, CC, Short Bed, SRW. Reese HP trunnion bar hitch W/ HP DC
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