Forum Discussion
dougrainer
Jul 15, 2020Nomad
wopachop wrote:
I was thinking about the out of normal OHM range. But even if that existed for my model it would be towards the benefit of cooling.
When you first start the fridge it will be ambient temps. So the probe will send that OHM signal. Fridge cools to 38F. Now with the probe off the fins, should the cooling continue to get much cooler? Since the probe is normally reading the fin temp that Doug described as being 10 degrees cooler. I would think a probe hanging in the air would have to read around 28F to send the correct OHM reading to shut down.
My particular dometic fridge does not have the temperature setting dial. But i still enjoy reading about other models and how they act. I want to find the OHM specs and test my probe.
Norcolds, unlike Dometic, actually MONITOR the slow progression of the cooling cycle. Lets say 70 degrees is the Interior start temp. The system watches the Temp drop. A Correct CU operation will yield 1 degree temp drops. So, 70 then 69 then 68 and so on. The usual fault point is around 50 degrees. If at some time, the refer while trying to continue cooling down reaches a plateau where the temp fail to continue dropping(way above a correct full cool down), the Norcolds will throw what is Called a NC or NO CO code. NO COOLING! At this point you can disconnect the Thermister and the Norcold enters BOS mode (Back up operating). This causes the refer to run for a set time then shut off for a set time then start again and continue the start and stop. Now, as I stated, I do not know what the parameter is when you have the Thermister sense AIR only temp and it CANNOT see a steady progression of a cool down. Dometics operate slightly different and usually the hanging Thermister causes full cool down. Doug
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