Question about Dometic Rooftop RV Air Conditioner

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Fan runs then compressor kicks in. instant 66 amp draw,clunks and shuts down ??

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Sounds like the compressor is seized up or starting to. You could try a hard start kit to give it an extra boost and maybe it will snap out of it.

Posted on Jul 16, 2010

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I ha ve a trane xe 1200 hvac the fan runs but when the compressor tries to kick on it hums and kicks right back off it draws 91 amps when trying too kick on could this only be a locked up compressor or...


Hello Let it cool off,Install a hard start kit on the run capasitor.It is just 2 plug on wires.It just might start it,If not look for LRA amp rating on the name plate if it is 90 it is locked up.Try the kit I have seen it work.

Jul 12, 2010 | Heating & Cooling

1 Answer

I have a carrier outside unit 38YKB036310 unit It comes on & cools but after around a half hour it shuts down. The fan motor feels hot I replaced it (the fan motor) & still have the same problem.


does just the fan motor shut down and you can hear the compressor still running when this happens?
did you replace the running capacitor for the new motor? is the motor a compatable replacement? how many amps is the motor drawing?amps should be close or under nameplate rating? is the outdoor coil clean?did you reinstall the fan blade the same depth as the old one?do you have the proper voltage to the motor?

Jun 21, 2010 | Heating & Cooling

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Rooftop RV Air Conditioner: replaced capacitor on dometic 59516-531 steal trip...


You need to borrow a clamp on style amp gauge, and check amp draw on black wire in box where hydro wires connect. (PLEASE, be careful, and if not experienced in this type of test, don't try it, due to likelihood of getting a shock. ) If it's the compressor kicking in that's causing the breaker to trip, and capacitor is good, then it's usually a problem with either low incoming (supply) 110-120 AC voltage, which will cause high amperage draw, or compressor on it's way out causing high amp draw. If it's only drawing 15-18 amps, and your tripping a 20 amp breaker, then breaker is getting weak.

May 18, 2010 | Dometic Rooftop RV Air Conditioner

1 Answer

OUT SIDE UNIT SHUT DOWN IN HEAT MODE, WHEN YOU FIRST TURN IT ON IT RUNNS FOR ABOUT 30 SECONDS THEN BOTH THE COMPRESSOR AND FAN SHUT OFF FOR APROX 3 MINUTES {LARGE LINE STARTS TO GET WARM} AFTER 3 MINUTES...


Hi, You have a heat-pump, this I do no. The reason it is shutting down from how you have explained it to me, is the compressor is shutting down due to high pressure and it is going off on the internal overload. When the compressor cools down, it starts back up and runs again. As for the large line getting warm, this is normal for a heat-pump as in the summer this line will be cold. The reversing valve changes over the flow of freon and the flow goes in the other direction. Back to you're problem. The service tech is bleeding off freon because he is apparently showing with his gauges it is over charged? This will cause it to draw to many amps and shut off. Has this compressor been changed out recently? Or maybe freon added due to a leak? He is doing it because he is thinking it is over charged. It may be some if it runs for a few hours after it is bled off. Did you notice if he clamped his meter around a compressor wire to check the running load amps? If so, that's what he is doing. I would say this unit had work done on it recently or correct me if I am wrong. The condenser fan motor should not shut off with the compressor, it should run all the time even if compressor shuts off on internal overload, believe me!! The fan is wired separate from compressor. The only time this fan shuts off when heat is on, is when it goes into defrost, and compressor keeps running. For the compressor to run for only 30 seconds and shut off, and then back on in 3 min, on for 5 seconds and off again, sounds to me this unit is short cycling due to being under charged. It is strange it runs after he bleeds freon off for a 1/2 a day. As far as the fan shutting down to, and I would like you to get back to me, if the compressor was changed at some point, the fan wiring was connected to the contactor load side, so it shuts down when compressor shuts down. One fan lead is on the wrong terminal of the contactor. If this is the original compressor, this could have happened at the factory, I have seen this before. The tech should have seen this!! Going on and off this fast, would not cause the compressor to get hot enough to kick off and cool fast enough to come back on that fast! Sounds like low pressure. I don't like to knock other techs work, but this unit is not being checked properly. Without me being there to install my gauges and amprobe, all I can do is tell you he is wrong with his solution, way off. Heat-Pumps are much more tempermental then a split a/c only.What to do is call them back out and request a different service tech, or the service manager. This will be no charge to you! You should be reimbursed for the last call. E.P.A. allows us to only loose minimus amounts of freon installing our gauges also. It is forbidden to bleed it into the air. He could be fined $25,000 the 1st time!! It also sounds as though you have a problem in the defrost board that would cause this. Please call them back out and don't feel bad about it. This is you're right! Tell them about the fan also as if it is going off on high pressure which I think not, the fan would stay on. I know this is long but I want you to understand what is going on. I do this for a living and know whats up! I am a Licensed contractor in this field. Please keep me posted. I will be waiting to hear back.
Sincerely,
Shastalaker7

Dec 21, 2009 | Heating & Cooling

2 Answers

My new Danby dehumidifier never shuts off


This unit is designed with the intention of the fan running all the time. The compressor cycles on and off with demand, however the fan runs continuously to provide constant room circulation.

Sep 14, 2009 | Dehumidifiers

1 Answer

Fan runs with 3 amp draw, compressor comes on and draws 20+ amp, kicks out breaker, is compressor bad Tom


most likely compressor has seized but check start capacitor first if burnt out or just replace it with new one, it has to be replaced with new compressor anyway

Aug 17, 2009 | Heating & Cooling

1 Answer

During low voltage period window AC compressor shudders and kicks off, but fan runs, when voltage returns normal compressor runs.


low voltage issues causes higher amp draw and equipment to run a lot harder. whats causing the low voltage problem to the equipment? high amp draw of the compressor could be causing it to overheat and trip until the compressor physically cools down.

May 27, 2009 | Dometic Rooftop RV Air Conditioner

2 Answers

Fan quits and the compressor still runs


is this a split residential system. it sounds like you are talking about the condenser fan either way it seems like the fan is overamping and tripping on thermal overload which is a device in the motor that protects itself. when you shut it off for a while and turn it back on does the fan work. if you turn it off then turn it right back on does the fan work. when it shuts off is the motor really hot. if possible, and you know how, check amp draw. typically you can find the rated amp draw on the motor nameplate.

May 27, 2009 | Carrier 52CQ315 Air Conditioner

1 Answer

Fan runs, shuts down on cool


Sounds like a power supply problem. There is enough power to run the fan but when you turn it to cool the current draw by the compressor drops the voltage. The lower power light is telling you the answer to your problem.

Jul 17, 2008 | Dometic Rooftop RV Air Conditioner

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