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 > Dometic roof top ac unit

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GTMADNS

New Lenox IL

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Posted: 07/14/19 06:59am Link  |  Quote  |  Print  |  Notify Moderator

Can the roof tops ac unit by Dometic be recharged ?we have a 2014 sport coach. Back ac is ice cold front unit at same temp is cool but not cold.
Thanks in advance

midnightsadie

ohio

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Posted: 07/14/19 07:03am Link  |  Quote  |  Print  |  Notify Moderator

no,not without more work than its worth there are no charge ports on these units.BUT it could be a bad capasitor or some thing simple .

mike brez

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Posted: 07/14/19 07:04am Link  |  Quote  |  Print  |  Notify Moderator

I just did both of mine but ended up changing them Here


1998 36 foot Country Coach Magna #5499 Single slide
Gillig chassis with a series 40
02 Ford F250 7.3 with a few mods
2015 Wrangler JKU

dougrainer

Carrolton, Texas

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Posted: 07/14/19 10:08am Link  |  Quote  |  Print  |  Notify Moderator

Yes, they can. BUT it takes specialized equipment. NOT worth the time and expense so you just replace the upper unit. Before condemning the AC have it checked by a professional. Rear AC's on motorhomes will always get colder output. The rear AC has to turn over a smaller volume of air than the front AC. Always Post Year/ Brand of RV and Brand and Model of Appliance to get better help. Doug

10forty2

North Carolina

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Posted: 07/15/19 12:24pm Link  |  Quote  |  Print  |  Notify Moderator

Another thought is to make sure that your freeze-control thermistor is in place and working properly. If not, the unit's coils will freeze up and it will not cool or move air until it defrosts. My front 15K unit started freezing up and not blowing cold air. Turns out, after removing the cover up top, the thermistor had fallen off the coil tube and allowed the coils to freeze up.


1999 Holiday Rambler Endeavor, 36' Gasser
Triton V10, Ford F53 Chassis
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BUB1988

Temple Terrace Florida

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Posted: 07/27/19 09:18pm Link  |  Quote  |  Print  |  Notify Moderator

The cost of repairing could be as expensive as replacing with a new one. We replaced both roof A/C's with 15K units for $1200 including new thermostats.

atsrmf

Indio

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Posted: 07/31/19 07:31pm Link  |  Quote  |  Print  |  Notify Moderator

Junk it and buy new, you won't regret it. Installation is easy.

JackMS

Gulfport

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Posted: 08/10/19 09:29pm Link  |  Quote  |  Print  |  Notify Moderator

My rear AC quit blowing cold about 7-8 years ago. I called a mobile tech who checked it and said the Freon leaked out. I had him put a port on it. He charged me about $5 for the part and the service call. I put a little pressure in and found the leak. A hole was rubbed through a line. My buddy brazed it up. I pressure checked it again, pulled vacuum and charged. Worked great for a few years. Quit again but couldn’t find a leak this time. I bought a can of stop leak for R-22 and put it in, after pulling vacuum, and recharged again. Knock on wood it has been working since. Been about 5-6 years now.

Not saying this will work for every problem but I spent a little time and a few dollars and so far so good. My front a/c is on the third unit. First one lost Freon about a year after I bought it. Was replaced under warranty. Lasted about a year and it leaked out. I replaced that one so when my rear unit went out, I just figured I would try to fix it and see if it would work.


2005 Holiday Rambler Neptune 34pdd, Cummins ISB 300, Allison 2500MH, Onan 8.0QD
Prior Toad-2001 Chevy 2500 CC 4WD
Toad-2012 Honda CRV, Blue Ox Aventa II


GTMADNS

New Lenox IL

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Posted: 08/12/19 11:32am Link  |  Quote  |  Print  |  Notify Moderator

Well I cleaned the condenser last weekend and used it this past weekend and now the motor is seizing up. I can replace motor pretty easy but don’t know if that was my problem all along or if I still have a Freon issue

JackMS

Gulfport

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Posted: 09/07/19 07:28pm Link  |  Quote  |  Print  |  Notify Moderator

One motor I had was squealing and I sprayed some wd40 or similar on the motor bearings. It had set for a while and this got it going. Another time on another AC the motor wouldn’t spin. Had an AC guy look at it and he replaced some bushings on the motor mounts. They had let the motor settle down and it wouldn’t spin. If I remember correctly the bushings were about $10. Plus the service call of course. If you could get the fan to run long enough you could tell if it is getting cold, especially with top cover off you could see if lines are getting cold or not

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