BFL13 wrote:
According to this
http://bryantrv.com/docs2/docs/norcoldnxseries.pdf
At 70F it should be 11.1-12.0 kOhms. Mine is 8.2 MOhms
At 51F it should be 15.5-16.5 kOhms. Mine is 12.7 MOhms
At 70F the little Dometic one is 3.4 MOhms.
So assuming mine is out by having lower R on the whole range, then instead of shutting off the heat at 25, mine would still have been way lower so it never shut off. The little Dometic one would be even lower in R so it didn't do any good.
Perhaps my jury rig should have used both thermistors in parallel. ISTR they would add their Rs doing that. ??
Anyway, unless somebody says no, I plan to order the replacement thermistor part. I see in the manual above that it goes on the 10th fin from the right, at least to start with.
Purely based upon resistance, your MOhm failed thermistor should have told the fridge it was super cooled, however I suspect that any reading too far out of range will cause the fridge to simply cool full time. That would be preferred to having spoiled food.
The old Dometic one looks bad too as it should be around 8k Ohms @70F from what I found. At any rate, MOhms is way too high unless there were some models with a vastly different scheme.
For what it's worth, parallel resistor don't add or subtract. They follow this formula:
Rtotal = 1 / (1/R1 + 1/R2)
