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RUNS ON FAN BUT COMPLETELY SHUTS OFF WHEN GOING TO COOL HIGH OR L

FAN RUNS BUTWHEM I GO TO COOL HI OR LOW STOPS

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Sounds like a faulty Switch.  Let us know if you need more assistance.  

Posted on Mar 11, 2009

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Intertherm MGHA-070ABFC-05 will not run/cool


Multiple problems. Eliminate thermostat first. Remove face from wall and turn on breaker. If fan still runs you have a bad board or bad relay. If fan outside is running compressor should be too. These operate on same contactor. Verify you are getting 24 volts to coil side of contactor. If odf stops working and contactor remains pulled in you have a bad motor. If odf motor stops working the compressor will shut off due to overheating.

Jun 07, 2016 | Intertherm Air Conditioners

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Intertherm a/c hardly blows on low fan setting


are you saying the outdoor unit does run, then shuts off?

if not, there may be fuses in the disconnect

if so, it may be going out on low pressure, possibly high pressure....clean all coils, filter, blower wheel, inspect coil if possible

Jul 26, 2012 | Dometic Rooftop RV Air Conditioner

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Fan noise-fan lags speeds up to normal then slows and will eventually stop. This occurs on fan only operation (high and low) and cool high and low.


The bearings,or bushings in the fan motor are gone out,the friction eventually slows,or stops the fan motor.

Jul 01, 2010 | Air Conditioners

2 Answers

Fan will not run on high. Compressor runs fine but the fan will not run on high. Works fine on low and med.


It's the mode switch contactors for the high setting just overview the wiring of the high cool or high fan contactors if it's not there check all leads for the high fan or high cool circuitry.

Aug 01, 2009 | Coleman Mach III Air Conditioner

1 Answer

This is a heating and cooling through the wall heat pump. It works normally when heating is selected - the heat pump runs and both speeds of the fan blow warm air. But nothing runs when cooling is...


You have a bad board or bad switch. I would say board. You can have service tech check this out. There is only so far you can go without knowledge of Controls ad electricity. Russ

Jul 21, 2009 | Air Conditioners

1 Answer

I have a DuoTherm unit on my 1989 Cross Country that only runs in the "low" position and shuts off after about 5 minutes. Won't come back on until about an hour later, then runs for 5 minutes or so...HELP!


Is the unit ducted with a wall mount thermostat? If so, then I would say that you need to check the thermostat. Remove the face plate from the thermostat, there should be 6 or 7 wires, depending on the model. With the thermostat set to high/cool, check for power at the yellow wire and the blue wire. Yellow is the compressor terminal and blue is the high fan. If you have no power at the blue terminal, then you have a bad thermostat. If there is power there, then you need to access the control unit in the air conditioner (remove inner shroud). Check for power at the blue wire at the control unit. If there is power, then you have a bad control unit. The unit is shutting down because it is freezing up in the low fan speed position. You can use a jumper wire on the thermostat to go from the +12 terminal (red wire) to the Hi Fan terminal (blue wire) and also the fan terminal (Either tan or orange, depending on the model). If the fan comes on, then you have a bad thermostat. If not, then you have a bad control unit or the high speed in the fan motor is out.

Hope this helps,

Jeff

Jun 30, 2009 | Dometic Rooftop RV Air Conditioner

2 Answers

I have a 1993 yellowstone camper with a coleman wall thermostat. on the bottom of it- it has a heat/cool switch on one side and the other side has a low-high-fan switch. when we run it on low or high it...


These unit are set up for continuous fan operation when turned on. It does not have an automatic position on your thermostat such as in your house. Set the fan speed to what you are comfortable with and let the thermostat control the temperature.

Jul 21, 2008 | Coleman Air Conditioners

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

1 Answer

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.

Jun 23, 2008 | Dometic Rooftop RV Air Conditioner

2 Answers

High cool and low cool not working


Hi,
Pls check the following....
1) Fix the wire connector to Reversing vale
2) Check the Capacitor if this a low capacitance or (open) not function using Multi-tester.
3) Check the Selector switch if this is not function using Multi-tester . or check the PCB Board (if electronic your units) replaced the Board.

If not yet,go to the nearest repairman to repair that units.

Thank you,have a nice day.


Edgz

Jan 25, 2008 | Amana PTC093B50AJ Electric Heat Air...

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