AC slightly cool but not cold

[Ejenkins]

I have an 8 year old 3150. We had the bedroom AC replaced around year 3 when it was under warranty. This past weekend we noticed that the bedroom AC was running slightly cool but certainly not cold. The living room AC was pumping out cold air and that is what saved us. The BR AC did just enough to keep air circulating but the cold air was coming from the living room.

When I got home I pulled off the cover of both and was prepared to clean the condenser. Both looked like they had just been washed but I cleaned them anyway.

Maybe it's just my bad luck but to have two bedroom, roof top ACs go out in 8 years but that seems like a long shot. Most everything I have read says that when the AC quits blowing cold most of the time you have to replace them since there is no Freon to refill and you would never replace just the compressor.

I know, I need to take it to a service shop and no, I am not a handyman.

The only reason I am posting this is just in case there is someone who has the same thing happen and there is some reasonably simple answer that I can try.

[kdeiss]

Ejenkins, The temperature of the Air coming out of the AC unit should be 18 to 20 degrees cooler then the inbound you measure the temp at the unit by the filter open the louvers on the outbound air. If you are not getting those readings something is wrong. Dometic had some defective evaporator coils mine was a 2013 model BriskAir ii
The Main unit was replaced twice and the Bedroom once. Dometic is silent recall they will replace the unit not labor. You need the serial numbers and models. If you are interested I believe I have an Email address.

[kdeiss]

techservice@dometicusa.com


Tech Service 800 216 5115

[jeffba]

LOL another good use for my thermopop.

[kdeiss]

Here are the date range for Dometic Briskair ii For Defective Evaporator Coil


time period including all of 2013, 2014 and Jan Feb Mar 2015.

[Ejenkins]

Originally Posted by kdeiss

Ejenkins, The temperature of the Air coming out of the AC unit should be 18 to 20 degrees cooler then the inbound you measure the temp at the unit by the filter open the louvers on the outbound air. If you are not getting those readings something is wrong. Dometic had some defective evaporator coils mine was a 2013 model BriskAir ii
The Main unit was replaced twice and the Bedroom once. Dometic is silent recall they will replace the unit not labor. You need the serial numbers and models. If you are interested I believe I have an Email address.

Kdeiss, I am very interested in the email address. Thank you for providing.

[kdeiss]

Ejenkins, Take off the Filter Grill with a flash light look up and you will see the name plate if you can not read you can peal off just take care. Email Dometic with Model and Serial and ask if you unit is part of the recall

[Ejenkins]

I was fortunate on this one. The AC was replaced in 9/2016 with a 2 year warranty.

[mhs4771]

We have Friends who have had there AC replaced Five (5) times on a three year old Grand Design.

[rtolbert2]

I have a 2018 Montana with Dometic a/c. The bedroom unit changes from Fahrenheit to celcius by touching/bumping the wall. I have set the unit to auto and mid sixties for nights, but after a few hours the blower goes off but the room remains cool. Does anyone have any suggestions?