Forum Discussion

tommy_g's avatar
tommy_g
Explorer
Sep 06, 2018

More Dometic RM7732 fridge assistance

I have a Dometic RM7732 fridge. It's 20 years old with it's second cooling unit and lately seems to cool at best to 41 degrees f. It is not in a slide-out and the motor home is kept under a carport with no sun hitting the fridge. Our weather here has stayed around 90 with very high humidity lately. I recently replaced the burned out vent fan with three new ones. The upper board seems to be getting flaky. When I set it to level 3, it jumps back to level 1. Level 4 jumps to level 2. It will stay on 1,2 or 5. The temp is up around 50 when on 1 or 2. Does this seem to be an indicator of the upper board going bad or could something be going on with the lower control board that would cause this? This unit used to stay cooler than this.....even in this weather.
  • Old-Biscuit's avatar
    Old-Biscuit
    Explorer III
    Sep 07, 2018
    newman fulltimer wrote:
    dougrainer wrote:
    tommy g wrote:
    Wow guys! I'll need some more input for a consensus. I do agree about the Dinosaur boards. They have one that will replace the lower(yes main). They do not have one for the upper but there is a replacement. The quoted price estimates are pretty accurate though.


    So, you base how you do repairs on what the majority agree with???????
    Don't you think it would be BETTER to base what you do on WHO is posting and NOT what the Majority think????? The expertise of who posts out ways what the majority "think". That said, the UPPER EYEBROW board is the fault. The lower just responds to what the UPPER Board tells it. So, I called it an UPPER EYEBROW board. How do you think I came up with that term? 38 Years of RV TECHNICIAN experience and still working as well as Old Biscuits post(who is a RV tech also). Doug



    Hey Doug dont be insulting old biscuit he is a RETIRED rv tech he made his living as one of us



    Actually...........NO
    Never was an RV Tech, never made a dime as an RV Tech, never even did work as an RV Tech other then help others time to time.

    Grew up with a Dad that taught me how to be inquisitive & LEARN
    NAVY taught me how to diagnosis/interpret/repair with little to nothing available
    Retired Power Plant Operator....where one had to learn/understand MANY various systems (fuel, water, air, boilers, turbines, generators, voltages/electrical 12V DC to 500KV AC etc etc etc.)

    That and some common sense approach helps. :B
  • newman_fulltime's avatar
    newman_fulltime
    Explorer II
    Sep 07, 2018
    dougrainer wrote:
    tommy g wrote:
    Wow guys! I'll need some more input for a consensus. I do agree about the Dinosaur boards. They have one that will replace the lower(yes main). They do not have one for the upper but there is a replacement. The quoted price estimates are pretty accurate though.


    So, you base how you do repairs on what the majority agree with???????
    Don't you think it would be BETTER to base what you do on WHO is posting and NOT what the Majority think????? The expertise of who posts out ways what the majority "think". That said, the UPPER EYEBROW board is the fault. The lower just responds to what the UPPER Board tells it. So, I called it an UPPER EYEBROW board. How do you think I came up with that term? 38 Years of RV TECHNICIAN experience and still working as well as Old Biscuits post(who is a RV tech also). Doug


    Hey Doug dont be insulting old biscuit he is a RETIRED rv tech he made his living as one of us
  • tommy_g's avatar
    tommy_g
    Explorer
    Sep 07, 2018
    Doug, I was hoping that you would reply. Yea, I was leaning that way and just needed reassurance. Do you think that the "jumping around" would cause the settings to actually not be correct, i. e., 5 is actually 3 or 4? Just curious 'cause I'm gonna replace it anyway.
  • dougrainer's avatar
    dougrainer
    Nomad
    Sep 07, 2018
    tommy g wrote:
    Wow guys! I'll need some more input for a consensus. I do agree about the Dinosaur boards. They have one that will replace the lower(yes main). They do not have one for the upper but there is a replacement. The quoted price estimates are pretty accurate though.


    So, you base how you do repairs on what the majority agree with???????
    Don't you think it would be BETTER to base what you do on WHO is posting and NOT what the Majority think????? The expertise of who posts out ways what the majority "think". That said, the UPPER EYEBROW board is the fault. The lower just responds to what the UPPER Board tells it. So, I called it an UPPER EYEBROW board. How do you think I came up with that term? 38 Years of RV TECHNICIAN experience and still working as well as Old Biscuits post(who is a RV tech also). Doug
  • tommy_g's avatar
    tommy_g
    Explorer
    Sep 07, 2018
    Wow guys! I'll need some more input for a consensus. I do agree about the Dinosaur boards. They have one that will replace the lower(yes main). They do not have one for the upper but there is a replacement. The quoted price estimates are pretty accurate though.
  • Old-Biscuit's avatar
    Old-Biscuit
    Explorer III
    Sep 06, 2018
    Upper Board is the one that is flacky....


    Lower board would NOT cause the Upper to jump around when selecting temp settings
  • donn0128's avatar
    donn0128
    Explorer II
    Sep 06, 2018
    Lower as I understand is the "main" control board. So start there. Dinosaur boards is your best choice.
  • tommy_g's avatar
    tommy_g
    Explorer
    Sep 06, 2018
    Naw! New upper board is +/- $80... New lower board is +/- $100... New fridge +/- $3500 plus remodeling to fit. Or New residential +/- $800 plus remodeling to fit plus inverter plus extra Batteries plus finding a place to put new batteries. I'm just trying to determine if I need a new board and possibly which one.

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