Question about Dometic Rooftop RV Air Conditioner
Air conditioner worked fine with first use now it just hums, will not run properly.
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Posted on Jan 02, 2017
The most common failure for this problem is either the start/run capacitor or the fan motor. IF YOU ARE NOT experienced with electricity then I would strongly suggest hiring a technician. The volts are 220 with a potential of 50 amps in a common residential unit.
If you are knowledgeable in this area then make sure the motor has volts to it. If it does have volts and does not spin, it is bad. You can sometimes tell by feeling the motor it will probably be very hot. The compressor will eventually shut itself off when it over heats. It usually will restart after it cools down(sometimes many hours). The motor and capacitor are pretty generic and can be matched up at a local Grainger store or whatever Retail, specialty store that you have in your area.
I hope this helps:)
Posted on Jun 25, 2008
SOURCE: duo therm air conditioner
My problem is the fan never goes off runs 24-7 and you can hear the compressor kick in from time to time. Is something wrong or do they all do that for a roof top unit? Any help on this one?
Posted on Jul 19, 2008
You hear the compressor kick in (Hum) but no fan comes on? Will the fan come on when just in fan mode, not cool, or do you have that set-up?
Posted on Aug 14, 2008
Check each screw on your compressor to ground (compressor case). Should be very high resistance Then check the resistance across your teminals on the compressor to be sure it is not shorted. Then check the wiring to your capacitor (The big one). I ran across this just last week. The mechanic didnt have the capicator wired correctly. If it is brand new it will have a wiring schematic somewhere on it.
Dont leave the compressor on very long, but turn it on long enough to get a voltage reading across the terminals. I assume it should be 240 volts. If you have check all of this, they make a jump start gadget to start a stuck compressor. They sell it just about everywhere. Let me know how this comes out..
Posted on Sep 30, 2008
need to add refrigerant
need to check wheather the ampere is the same on the name plate
check the room temp. setting
check the setting of the timer
Posted on Jan 26, 2009
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