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Thread: Air conditioner

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    Air conditioner

    running the A/C with the fan on auto it runs trough 5 or 6 cycles then fan shuts off and compressor runs. Sometimes fan kicks back on and starts all over again. Had it in to place we bought it and said ran it for 8 hours and nothing is wrong. We have had this issue since we bought it 2017 337RLS. Any ideas

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    Seasoned Camper
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    Quote Originally Posted by Laurynp99 View Post
    running the A/C with the fan on auto it runs trough 5 or 6 cycles then fan shuts off and compressor runs. Sometimes fan kicks back on and starts all over again. Had it in to place we bought it and said ran it for 8 hours and nothing is wrong. We have had this issue since we bought it 2017 337RLS. Any ideas
    What brand AC unit and thermostat?

    Mark
    2014 HDT Volvo 780 "Baby Bird"
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    Quote Originally Posted by Laurynp99 View Post
    running the A/C with the fan on auto it runs trough 5 or 6 cycles then fan shuts off and compressor runs. Sometimes fan kicks back on and starts all over again. Had it in to place we bought it and said ran it for 8 hours and nothing is wrong. We have had this issue since we bought it 2017 337RLS. Any ideas
    If it is a Dometic A/C my understanding is when the fan is on AUTO it will run on high speed until the temperature in the trailer is within 5 degrees of the set point and then the fan will stop for a couple of seconds and then restart on low speed. The compressor will continue to run during this process.
    2018 297RSTS
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    Big Traveler Calbar's Avatar
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    Quote Originally Posted by srobins View Post
    If it is a Dometic A/C my understanding is when the fan is on AUTO it will run on high speed until the temperature in the trailer is within 5 degrees of the set point and then the fan will stop for a couple of seconds and then restart on low speed. The compressor will continue to run during this process.
    This is my understanding as well and mine does exactly that. I thought something was not right originally the first time I used it but found out that this is completely normal.

    Rob
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    Rolling Along cfowler55's Avatar
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    If the compressor is running continuously without the fan , check the t-stat wiring. Our front unit had the compressor control wire and the high speed fan control wire swapped at the stat. Easy to diagnose with a DC meter. All the wiring is color coded , and there are diagrams on the roof unit & the stat.
    Charlie
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    Quote Originally Posted by srobins View Post
    If it is a Dometic A/C my understanding is when the fan is on AUTO it will run on high speed until the temperature in the trailer is within 5 degrees of the set point and then the fan will stop for a couple of seconds and then restart on low speed. The compressor will continue to run during this process.
    Exactly - that is why I asked about the brand - a lot of folks are unaware of this and Dometic did not do a good job of "getting the word out" on this change.

    Mark
    2014 HDT Volvo 780 "Baby Bird"
    2016 Smart Car "Baby Bird Turd" - on the back
    2020 Momentum 376THS
    We're both proud USAF Retirees...

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