roof top Dometic A/C cycling problem
Our TT is 5 years old and we have had no problems with the a/c. Recently it has, on occasion, started cycling on and off rapidly. The only way that we have found to stop it is to turn the unit OFF fo...
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Mine was doing that on a +90 degree day. I had the theromstat on auto. I tested it yesterday with the thermostat on manual HI and ran it for 30 minutes without problems. The temperature was lower 76 degrees. When the unit was short cycling it would shut down completely, fan and compressor. The power in trailer was stable, no other electronics flashed.
I re-tested today at 90 degrees. With the thermosat set to FAN HI it ran for 30 minutes without problems. I checked the owners manual online and found that it was designed to cycle BOTH the fan and compressor off and on during the auto mode. This is the exact quote from the manual Auto Fan pg 11.
"When auto fan is selected the fan speed will vary depending on the
difference between the temperature set-point and the room temperature.
In auto fan the compressor and fan cycle On and Off with the
thermostat.
When the difference is:
>5º The fan operates on HIGH
<4º The fan operates on LOW"
mm49
I re-tested today at 90 degrees. With the thermosat set to FAN HI it ran for 30 minutes without problems. I checked the owners manual online and found that it was designed to cycle BOTH the fan and compressor off and on during the auto mode. This is the exact quote from the manual Auto Fan pg 11.
"When auto fan is selected the fan speed will vary depending on the
difference between the temperature set-point and the room temperature.
In auto fan the compressor and fan cycle On and Off with the
thermostat.
When the difference is:
>5º The fan operates on HIGH
<4º The fan operates on LOW"
mm49
