Question about Dometic 57915531 Air Conditioner

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Fan is so low, no water in roof, cool but not cold

Modle # 57915.751 the air is cool but not cold, water never runs off camper, and the fan is so low you can hardly hear it run.

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Clean the coils with acid [foamagator] oil the fan motor. click the fan and pay close attn to see if it changes. the blower switch may be bad. if you here it change speeds , you may need to put freon in it....good luck sawdust46

Posted on Jul 25, 2009

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Posted on Jan 02, 2017

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Where is the drain?


There are grooves on both sides of ac unit on a camper and it drains down the roof to a little gutter that travels the water towards end of camper and drains. Most of the time down the side of camper, but if these Grove are stopped up it will not allow it to drain and cause it to overflow inside camper. If filter is very stopped up or evaporator coil is stopped up, fan not running, low on refrigerant, or having the thermostat set way to low can cause it to freeze up and when this water thaws out it is too much for the drain to handle and also ice could be sticking being the drain pan melting causing it to go in your camper. I would check filter and those drain grooves first.

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I have a jayco pop up camper with a Duo-Therm BriskAir roof top a/c. im having problem with it leaking water inside of the camper? Is there a drain hose? Or wat do u think is wrong?Thanks


Yes there are drain holes in base of upper unit (on roof), which may be plugged. Couple of questions though to see if we can better troubleshoot this for you.
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We have a 77 kountry aire bumper camper with roof air, we went camping and the unit cooled the camper really good then it just didn't seem very cool after checking it found the compressor was not kicking...


yes left the fan running and it did not kick on, checked the fins when we found it was not cooling there was no frost, do not no if would start again after sitting for hours it was so hot we just packed up and came home will have to try that when we get it somewhere to plug it in

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Fan runs but no cool air. I don't think compressor is kicking in. Thermostat is working because when I adjust temp to be below or equal to air temp, AC unit turns on. When air temp drops as trailer cools...


Have you cleaned the unit? The condenser coil? The filter? The evapartor coil? Sounds like an airflow problem. You need to clean these areas. You can clean the condensor coil with water hose and a coil brush you can get at the hardware store. Clean the evaparator with the same brush. YOU can use a hairbrush if you don't have anything else. But make sure you go up and down on the fins on the coils not sideways. You might check your blower fan for dirt also. Good luck I hope I helped you. Could also be low on charge but first try cleaning.

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I have a 1.5 hp kelvinator wall mounted air cond.It has three button (cool,fan,and dry)If I want to get the room really cold what is the best button to push


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The best button to push for that is the cool button, then turn the thermostat all the way to cold.
The fan button will only move air around and will do no cooling.
The dry button is for dehumidification, in this mode the unit will run a low speed fan over the cooling coil to take the water out of the air.

So for cooling your best option is to push the cool button and crank down the thermostat...

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High cool not working


Compressors on these units runs at only one speed. The change to high cool is only a change in blower speed moving air faster over the cooling coil. I would have the running capacitor for the fan motor checked. A bad capacitor can cause your type of problem. The other problem could be that the high speed winding in the fan motor is bad. Try it operation in the fan only position through the two speeds. If it works in the low and high speed for fan only your problem could be in the selector switch.

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