sfpcservice
Suisun City
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I have a Norcold model 772 EG2 fridge and when the outside temp goes up, so does the fridge temp. Today it was about 100F outside and the temp inside the fridge got to about 45F. A week ago I tried to address this problem by adding 3 80mm cpu fans to the condenser coils and one smaller fan inside the box. It seems to have helped some, but the lower coils on the fridge are still too hot to hang on to for very long. I'm wondering if the lower coils need fans too?
I have a side vent to the back of the fridge and a roof vent up top, which I also added some sheet metal to in order to direct the draft closer to the condenser coils. The TT is level front and back and I have not tried it on gas yet, this is all on electric.
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Old-Biscuit
Across the USA
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Joined: 06/20/2009
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With the fans you are sucking 'hot' air thru lower vent and pushing air over coils out thru roof vent.
100*F outside temp is really tough to use as 'cooling' air.
I'm not sure much more can be done with that kind of outside air temp.
The sheet metal you added.....not causing a restriction in air flow/draft??
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sfpcservice
Suisun City
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Old-Biscuit wrote:With the fans you are sucking 'hot' air thru lower vent and pushing air over coils out thru roof vent.
100*F outside temp is really tough to use as 'cooling' air.
I'm not sure much more can be done with that kind of outside air temp.
The sheet metal you added.....not causing a restriction in air flow/draft??
The sheet metal is not very restrictive, just more of a tapered baffle to bump the air away from the wall and closer to the coils...
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Gale Hawkins
Murray, KY
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Sounds like ours when the leak was very slow.
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skipnchar
Topeka or somewhere else
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Might be helpful to check the door seal and the climate control switch (if yours has one). the door seal that is leaking will certainly be effected more in very hot weather. The climate control switch actually turns on a heater to evaporate moisture from inside the fridge and makes the fridge slightly less efficient. If you're running AC in the interior of the RV then that should help the fridge out some also so if you are NOT running AC that could be part of the cause.
Good luck / Skip
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sfpcservice
Suisun City
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skipnchar wrote:Might be helpful to check the door seal and the climate control switch (if yours has one). the door seal that is leaking will certainly be effected more in very hot weather. The climate control switch actually turns on a heater to evaporate moisture from inside the fridge and makes the fridge slightly less efficient. If you're running AC in the interior of the RV then that should help the fridge out some also so if you are NOT running AC that could be part of the cause.
Good luck / Skip
The door seal appears to be ok with the door locked shut. Mine just has a drip pan, no heater inside and also no Air Conditioning in the trailer. I'm wondering if it's just at it's limit with very high temperatures outside? I placed a small 120V fan near the bottom inside the plenum and I'll see if that makes any difference tomorrow I guess.
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JJBIRISH
Butler, PA, USA
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I am not familiar the model you have…
All of those fans shouldn’t be needed although they might help…
It could be you have reached the limit of the fridge, especially if the box isn’t insulated very well…
My Norcold works well even in the high temps when set at midway on the temp selector… but I can’t place some things like ice cream on the freezer door because of the wimpy door insulation…
I believe their optimal design ambient operating temp is between 80 and 85...
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sfpcservice
Suisun City
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JJBIRISH wrote:I am not familiar the model you have…
All of those fans shouldn’t be needed although they might help…
It could be you have reached the limit of the fridge, especially if the box isn’t insulated very well…
My Norcold works well even in the high temps when set at midway on the temp selector… but I can’t place some things like ice cream on the freezer door because of the wimpy door insulation…
I believe their optimal design ambient operating temp is between 80 and 85...
It's an older model, in a 1983 Fleetwod Terry. I couldn't find any info on the web either.
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JJBIRISH
Butler, PA, USA
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Sorry I couldn't be more helpful...
I wonder why those funny symbols are showing up in my post??? they aren't there until I post the massage and it only happens sometimes...
 And now they are gone…
* This post was
edited 07/21/12 10:54pm by JJBIRISH *
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sfpcservice
Suisun City
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I'm thankful for all the replies! Right now, after looking at a refrigerator diagram, I'm wondering if cooling the absorber coils is actually hindering refrigeration?
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