Question about Dometic 57915531 Air Conditioner

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Compressor shuts down 59516.531G

The compressor shuts down and won't start again for approximately 30 minutes. I have checked the freeze sensor which seems to be fine and working. If I plug the thermostat into the second port on the control box all seems to run OK but will not cycle. 
any suggestions?

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Is the compressor too hot to touch when it shuts down? This would indicate a low charge

Posted on Aug 02, 2008

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At night its shuts down when the therm is satisfied,but trys to restart right away and when it does start it shuts down right away and just keeps doing this


The thermostat has a differential built into the temperature sensing operation. The differential is normally a degree or more. If the stat shuts down at 72 degrees it should not start the unit again until the temperature in the room reaches 73. If the AC runs and cools properly until it shuts down, I would check the thermostat. The AC can not restart immediately after it shuts off because the pressures in the system are too high at the compressor. It takes a few minutes for the pressures equalize allowing the compressor to start. If the stat tells the unit to start under high pressure, the compressor will shut down on overload. It will start and run after the pressure falls enough for the compressor motor to run.

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Duo Therm A/C (2009 Sabre RV) won't shut off


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Jun 06, 2013 | Dometic Rooftop RV Air Conditioner

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About once a week the compressor get hot and shuts off. I have to leave hom for 12 hours then turn unit on and it cools for another week and shuts off again?


If compressor starts, check the running current of the compressor. If amperage is too high together with the discharge pressure, try cleaning the condenser fins and then after cleaning test the amperage and pressure again. If the pressure is still above the normal operating of 300psi, release some freon. If the discharge is too low below 200psi and running ampere of compressor is below the rated ampere of the unit add some freon from the suction line until it reaches 60-65psi. If still suspicious with the unit, try removing all freon charge and evacuate the system to 30 in. Hg to remove any moisture from the system and hold the vacuum for 30 minutes. If no increase in system pressure, recharge and check pressures and amperage.

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Goodman GSC130361DE premature shut off


im not sure what tstat you have? if you still have your tstat book it well tell you how to set it up. may be it was not programed when installed. i hope that helps

Apr 06, 2010 | Goodman CLQ30AR32 Air Conditioner

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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 | Air Conditioners

1 Answer

Blows cold but shuts down no freeze up


Check the capacitor. It should be a dual capacitor , runs both compressor and fan. This sounds like your problem only because both the compressor and the fan go out together. Good Luck Hope I helped

Dave

Sep 16, 2009 | Dometic Rooftop RV Air Conditioner

1 Answer

Compressor starts and doesn't stop


Relay for the compressor may be stuck ( Contacts welded) both the fan and the compressor should operate at the same time. Have the relay(s) checked and possibly replaced.

Apr 29, 2008 | Dometic Rooftop RV Air Conditioner

1 Answer

P-tac unit shutting off


Start the unit and check unit data ( suction pressure, discharge pressure, current reading voltage reading, check if no icing at compressor suction pipe and evaporator coil) if everything is normal. check the fallowing.
- check for out of range pressure switches. By pass pressure switches and start the unit if the unit continue to run check which of the pressure switch is open while the unit is running.
- check for defective timer and magnetic contactor or control rely.
- if the unit installed with freeze up sensor then check it also.
- Or the control by itself.

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