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mick2268's avatar
mick2268
Explorer
Jun 07, 2018

UPDATE: Normal A/C Operation?

OK so wanted to bring all up to speed on my AC issue. So I called a local RV service guy, who came to my place and serviced my AC.

SO he says that units coming from factory with a "light charge" is not uncommon. It is also very easy to diagnose. He puts a multimeter on the compressor to measure amps. Mine should be pulling 13.3; it was pulling 9.

He used a line tap that resembled what we use to use to tap a water line to get water to an ice maker, only higher quality. Put some 410 in it, and it was blowing 54 degrees in no time. No cutting, no braising.

Warrantied for a year, $135 and $50 was him coming to me. He said dealers don't advertise this as an option, and many AC's get replaced when all they need is a bit more Freon.

Which brings me to ask the question: other than AC sales...why are RV systems sealed, and not serviceable like our cars and homes????

16 Replies

  • 1320Fastback wrote:
    I considered having my AC serviced also. It is a 2015 Dometic model and has never really performed very well at all. I finally made up my mind and ordered a Atwood to replace it.

    I might still have a AC tech come look at the old one. Will build a small frame for it with power and see if it can be fixed.


    Your unit may be under recall. Dometic had a bad run in late 2014, most installed in 2015. Call Dometic with model number and serial number to check. They sent a mobile tech to replace my 15K on our 2015 Sierra in June of 2016, RV was out of warranty. They also gave me a 5 year extended warranty on our 13.5k as it was under the recall but still working great.
  • I considered having my AC serviced also. It is a 2015 Dometic model and has never really performed very well at all. I finally made up my mind and ordered a Atwood to replace it.

    I might still have a AC tech come look at the old one. Will build a small frame for it with power and see if it can be fixed.
  • mick2268 wrote:
    OK so wanted to bring all up to speed on my AC issue. So I called a local RV service guy, who came to my place and serviced my AC.

    SO he says that units coming from factory with a "light charge" is not uncommon. It is also very easy to diagnose. He puts a multimeter on the compressor to measure amps. Mine should be pulling 13.3; it was pulling 9.

    He used a line tap that resembled what we use to use to tap a water line to get water to an ice maker, only higher quality. Put some 410 in it, and it was blowing 54 degrees in no time. No cutting, no braising.

    Warrantied for a year, $135 and $50 was him coming to me. He said dealers don't advertise this as an option, and many AC's get replaced when all they need is a bit more Freon.

    Which brings me to ask the question: other than AC sales...why are RV systems sealed, and not serviceable like our cars and homes????


    Curiosity killed the cat. What brand of AC is your unit?
    Also 8.5K, 11K, 13.5K, 15K?
  • Home appliances like refrigerators, freezers, dehumidifiers and window air conditioners usually have no charge ports. The light charge information is good to know, quality might be on par with the rest of the RV industry.
  • Its 4 years old, and has never done very well. Couldn't keep up, and froze up often. The fact that there was still enough Freon to run compressor after 4 years; makes me feel confident there is not a leak. Can't imagine any Freon being left after this amount of time.

    But time will tell.
  • Was this a new A/C unit (I don't remember the original thread). If not did he try to trace where there may be a possible leak using a leak detector?