Quote:
Originally Posted by footdoc
I want these 2 or more added fans to have a manual switch. Any suggestions on where they SHOULD go?
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FootDoc,
I have personally spent the last three years trying to solve multiple problems with my 2001 built Norcold 1200LRIM. With the help of a few people on this forum, I have been able to resolve almost all of them and now have a really great working Norcold for now. I still need the most recent recall to be installed and that should be done in a week or two.
Without going into a very long story about everything, you can search all of my Norcold Posts to read about it all here at iRV2. However here is a short synopsis of what I have done.
To resolve the erratic temperature swings I had for 3 years, I replaced the Thermistor. The old one had been tested 3 times and each time was told it was OK. It had an internal dynamic failure that caused my large temperature swings. I have installed two sets of 12 volt mini cooling fans inside the frig compartment to the fins above the top shelf. This distributes the cold air more evenly and prevents the frost and ice from building up on the fins. They are available from a gentleman on eBay. Here's the link. They are just over $17 with shipping and are fully guaranteed. He usually runs a holiday special if you buy two.
DOMETIC NORCOLD REFRIGERATOR FAN FOR RV 12 VOLT: eBay Motors (item 250677760674 end time Dec-02-10 14:37:30 PST)
The most recent change was while I was in Alaska this past summer, my two OEM rear cooling fans decided to start making such a racket that I had to disconnect them. Obviously either the bearings gave out or a plastic fin had broken off allowing the fan to vibrate terribly. I ended up installing four 120mm cooling fans on the rooftop vent and wired them into the existing snap disc circuit so they would come on at the same temp, 130F when the #1 fin at the top of the cooling stack got to that temperature. I also included an additional wire so I could install a manual switch which is now inside the Norcold rear access cover. I use that when I want to have additional airflow other than when the snap disc calls for it.
I have been able to keep the temperature setting around 5-7 depending on the outside temps, and the freezer is normally -4F to 10 F and the frig is 29F-39F depending on whether the frig is in its defrost cycle or not.
I am very happy with the outcome and hopefully will have many years left in this 9 year old Norcold. If the cooling unit does fail, I intend on putting in an Amish built unit or a residential unit.
No more Norcold for me.
I have included a few photos of the internal and extenal fan projects. If you would like more photos and more detail, please PM me as I have done a complete write up for others about the rooftop fans.
Dr4Film ----- Richard