Question about Dometic Rooftop RV Air Conditioner

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Manual / auto fan control

Air seems to work on auto. unit shuts down when temp is obtained and starts when temp rises. when fan sw. is set to On motor labors and does not come up to speed

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Sounds like the problem is fan switch related. That is if the speed of the fan is controlled through the switch.

Posted on Jul 24, 2008

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4 Answers

My domestic rv ac unit reaches the temp setpoint and the compressor shuts off but not the fan, it just keeps on running. Is this normal or should the fan shut off also?


Set fan setting to auto and not high or low setting. Fan will cycle with compressor after setting set to auto or " au" if a digital thermostat.

Mar 21, 2015 | Dometic Rooftop RV Air Conditioner

1 Answer

How do i put it on warm


on the remote control press mode button until u see the icon of the sun. then raise your temperature setting to the desired degree. there is a 3min delay from going from a/c, dehumidify to heat. temp will rise in the indoor unit. fan speed will be slow until it hits 90* across the evap coil then it will start ramping up in speed as temp rises.

Mar 12, 2014 | Samsung AS18A6RB Air Conditioner

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In Fan mode, fan works; but in AC mode, I can hear the normal AC sounds, except the fan never turns on. This is the fan in the lower half of the unit in the inside of the house, which blows the air...


on a call for air conditioning your therrmastat brings the indoor fan on and the out door unit at the same time. Since your fan comes on in "fan" mode, it sounds like you need a thermastat. For temp. cooling just turn your fan switch to "on" and turn system switch to cool and set desired temp. System will cycle off and on but fan will not shut off until fan control is set back to "auto". I suggest replaceing thermastat

Aug 16, 2011 | Air Conditioners

2 Answers

The fan has auto ond on selections, the heat looks to be running fine but the fan will NOT shut off.


The thermostat needs to be set for AUTO. If you have it on auto and the fan still goes even though the heater is off then you probably have a stuck fan limit. The limit has a long probe which goes n the plenum. As the heat builds in the plenum at the start-up of a warming operation the bi-metal inside that probe slowly twists around till the temp inside is 110 degrees, the fan comes on and we have warm air in the vents. Then when we have a cozy house the heat shuts down. The fan keeps a going till the heater cools down and the bi-meta twists back around and shuts down the fan. So what goes wrong? The bi-metal simply gets hung up in that position. Tapping on the dial will sometimes release it but it will keep occurring and become aggravating. themobilian_306.jpg
These limits come in various sizes and brands but this is the most common one. If your machine is a newer model then that control board has a fried or stuck relay on it.

Nov 28, 2010 | Air Conditioners

1 Answer

I can't get my furnace fan to stop running-even in the off position


Your thermostat has AUTO and MANUAL for fan Make sure it is set for AUTO. If it is set for AUTO and the heat is off and cooled down AND the fan still runs then that will be a bad relay. If yours is newer then the board will need to be replaced. If yours is an older model you may need to replace the fan and limit switch8fe474e.jpgThis mechanical switch works on rise in plenum temp. It turns on the fan a around 110 f and it shuts down the fan at 90f. Newer furnaces use timers and relay on the IC board.

Oct 26, 2010 | Air Conditioners

1 Answer

THE FAN WONT SHUT DOWN ON MY DUCTED HEATING. THE HEAT DOES BUT NOT THE FAN. IT SEEMS THAT THE ON/OFF BUTTON ON THE WALL UNIT IS NOT WORKING. THERE IS NO REMOTE CONTROL FOR IT.


Check the thermostat ... assure the "FAN" setting has not been set. FAN makes the fan run all the time. You want your switch to be set on "AUTO"

Thanks for your interest in FixYa.com

Aug 12, 2010 | Air Conditioners

1 Answer

Having trouble with heat pump.


It sounds like there is a problem with the blower....either the motor itself, the capacitor, a wiring problem or a control problem. If there is a warranty on the unit, have a tech check it out for you.

Let us know if this helps. Good Luck! :-)

Feb 23, 2010 | Air Conditioners

1 Answer

Stops cooling after a few mins


Check the condenser fan motor It probley has bad bearings and over heats and shuts down
after 15 or 20 min of run time

Jul 25, 2009 | Air Conditioners

1 Answer

Keeps running after shutting off-does not react to temperature co


it is normal for the system to run on its own without being turned on...the compressor motor needs to cool down and will run in an unloaded state. feel the back of the unit while its running and you will notice the amount of heat the motor generates. let it run.

Jun 18, 2009 | Air Conditioners

1 Answer

I set the thermostat to 70 degrees but it doesnt cool down to 70, it seems that the temp in the house only rises, instead of cools down.


Setting Unit at 70* ? and not cooler ( dropping temp in the house ) Question ? does temp dop at all, if so the Unit maybe unsized, if the temps are going up then the unit is not working at all - maybe just the fan is running. If this is a split unit ( outside unit / furance). A number of things could cause the same problem - call a sevice company. it could be anything -from a Breaker to an electrical part, split Units have to different breakers ( fuse) . Check that first

EM

Apr 26, 2009 | Air Conditioners

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