Comfort=Aire Model RADS-183G

[opcartmell]

Model Number

RADS-183G

Brand

-major brand-

Age

More than 10 years

This is a through-the-wall installation of a Comfort-Aire 18000 BTU system. The compressor runs when the unit is turned off resulting in a frozen evaporator. I believe this is caused by a bad component on the control board or the thermistor (sp) reading the evaporator input air. Also, can't find any manuals on removal and repair of the unit. All help is appreciated.

 

[Dan O.]

the thermistor (sp) reading the evaporator input air

If that were the case the motor would likely run too. Is it?

I believe this is caused by a bad component on the control board

I think that is very likely.

can't find any manuals on removal and repair of the unit.

I have no idea where you'll find that either but I doubt disassembly would be very difficult to figure out just by looking at how it is put together.


Dan O.

 

[opcartmell]

In reply to your question: no the fan motor isn't running, only the compressor. However, since several other similar threads mentioned a stuck relay we just smacked the side of the case next to the control panel with a substantial blow and the unit resumed cooling without freezing. So, we're pretty sure it's a bad or marginal circuit board. Going to wait a few days before making a final call on whether to repair now or later. Thanks.

 

[Dan O.]

If only the compressor is running, than the control has to be responsible. Quite possibly a 'sticking' relay on the electronic control.


Dan O.

 

[opcartmell]

After a summer of perfect operation, the same thing happens this summer; however, wacking it on the side didn't work this time. The compressor and the fan both run and the unit cools perfectly until it freezes up with both motors continuing to run. Any ideas on what part we need and how to get it?

 

[Dan O.]

the same thing happens this summer; ... The compressor and the fan both run

That is not the same as you reported previously. Previously you said "no the fan motor isn't running, only the compressor".

Any ideas on what part we need and how to get it?

About the only possibilities I can think of that would prevent it from cycling off are the control 'telling' it to continue to run, or more than one relay in the relay board sticking. The control making them run could either be caused by a problem with the control's temperature sensor (whatever type might is used) or the control board itself malfunctioning.

I don't have access to any service or parts information for the model to see how it was designed and to be able to know how to go about finding out for certain which might be responsible.

Dan O.

 

[opcartmell]

I believe, after continuing to search, the part I need is

CMF17120300000550​

 

[opcartmell]

Dan, thanks for the reply. Yes, I'm aware I reported a different symptom this time. The unit is in my son's home and he reported it to me differently this year. Anyway, thanks for your assistance.