Norcold Refridgerator, 4 door 1200 OEM Fans

[Knightly]

Originally Posted by Knightly

I hope this is my final update as everything is now working great!

As mentioned in my previous post, I ended up replacing the thermistor(inside fridge) and the Fan heat switch(outside top R/H corner). I noticed an instant improvement in the internal distribution of the temperature as a result of the thermistor replacement. Today, the outside temperature hit 84F and my OEM fans worked for the first time in a long while. Not sure if replacing the fan heat sensitive switch was necessary. I tested the old fan switch when I removed it from the back of the fridge and it appeared to work, however it took more heat then the new switch to get it to close. So, I replaced it considering the work involved to remove the vent screen to access the switch and then resealed with self leveling sealant. Anyway, the two parts cost around $50.00 so well worth the effort.

Once again, I would like to thank everyone who contributed to this thread. This site is a great resource!

I wanted to correct my first sentence in original quote. Should have read: ………... everything is "now" working great. My fridge continues to work well. The OEM fans are humming away and most important, my ice cream stays frozen hard

[SCVJeff]

Sorry for the lateness..
The internal thermistor has no control of the fans whatsoever, only the external snap switch you replaced. So that was the issue. As far as the upper screen, rather than remove the entire exhaust stack and have to re-screw it and weather seal.. simply cut out the screen out.. Home Depot sells a roll of the identical screen, slightly wider than the exhaust vent. I formed a drop-on vent that allows me access to that area anytime i need to get in. Remove vent top, remove screen, viola...