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 > Dometic freezer cold but fridge barely gets to 60 over night

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btcruzer

Missouri

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Posted: 07/28/20 09:05pm Link  |  Quote  |  Print  |  Notify Moderator

You might want to check out another post in this tech issues called dometic refrigerator woes....


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shastagary

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Posted: 07/28/20 09:17pm Link  |  Quote  |  Print  |  Notify Moderator

if it actually worked good on the test bench then you may suspect the installation and proper parameters of the venting and how close it is mounted to the outside wall to get a proper cooling chimney effect.
is one of the vents on the cabin roof or are they both on the side wall?


the manual describes the parameters dometic rm 3600

wolfe10

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Posted: 07/29/20 07:52am Link  |  Quote  |  Print  |  Notify Moderator

Yup, clearance dimensions as outlined in the installation manual are CRITICAL to proper cooling performance.

And, muffin fans on top of the condenser blowing UP improve performance.


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arcsum68

Northern CA

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Posted: 07/29/20 11:01am Link  |  Quote  |  Print  |  Notify Moderator

btcruzer wrote:

You might want to check out another post in this tech issues called dometic refrigerator woes....


On it, thank you!


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arcsum68

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Posted: 07/29/20 11:26am Link  |  Quote  |  Print  |  Notify Moderator

shastagary wrote:

if it actually worked good on the test bench then you may suspect the installation and proper parameters of the venting and how close it is mounted to the outside wall to get a proper cooling chimney effect.
is one of the vents on the cabin roof or are they both on the side wall?


the manual describes the parameters dometic rm 3600


Based on the PDF we are in clearance tolerance for height, also I have active fans blowing air up and out. I have also removed the top cover just to remove any restrictions, this obviously did not help.

Update, I believe it is a Dometic Americana RM2652 or RM2852. I checked those clearances as well and still believe we have plenty of room. Sorry for not knowing exactly what it is, if it were mine I would be well versed. Due to multiple issues I had not been on the thing in 2 years until last weekend and it sparked my desire to either figure it out or at least reclaim the space.

* This post was edited 07/29/20 11:43am by arcsum68 *

shastagary

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Posted: 07/29/20 01:12pm Link  |  Quote  |  Print  |  Notify Moderator

Quote:

I checked those clearances as well and still believe we have plenty of room


you do not just want just plenty of room you do not want a 8 inch gap at the back of the refrigerator it needs a smaller gap to force the cooling air through the cooling coils or baffles to force it through the coils keeping the burner side hot and the cooling coil side as cool as it can be otherwise the air coming in can just bypass the cooling coils not cooling them as good as it should reducing efficiency .

* This post was edited 07/29/20 04:53pm by shastagary *

wolfe10

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Posted: 07/29/20 01:16pm Link  |  Quote  |  Print  |  Notify Moderator

Correct-- too much space at the back allows turbulence vs laminar flow over the condenser. In fact correct MAXIMUM space is as or more critical as correct minimum space.

All this is covered in the refrigerator installation manual.

arcsum68

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Posted: 07/29/20 04:22pm Link  |  Quote  |  Print  |  Notify Moderator

Its a 1976, nothing was made big in this thing. There is the typical amount of space behind the fridge as you would expect in any typical RV. It has the upper vent and the lower panel vent. The fridge is flush with the cabinetry on the front and fits exactly into its cavity with the exception of the top.

arcsum68

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Posted: 07/29/20 04:23pm Link  |  Quote  |  Print  |  Notify Moderator

* I never would have guessed more room would be an issue, in fact in trying to see if it was TOO little space I actually pulled it out from the wall a few inches thinking it would have more room to breath (as a test). Great info, thanks!

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