Norcold Fridge on Propane Question

Boon Docker wrote:

MT BOB wrote:
Really? What is an RM8,there is virtually no info on the net.And,seems you do not understand logic,when the thermostat calls for more cooling, the flame gets higher, and the increased flame makes the ammonia heater work harder, producing more potential to remove heat from the inside of the refrigerator.AND,as it appears you do nothave/own a fully electronic refrig. your symptoms are perfectly normal.same as if you do not take your foot off the gas pedal, when rushing downhill.

:h

So when the fridge is running on 120V instead of propane does the heating element receive more power to make it hotter.

It seems someone here does not understand how an absorption fridge controls the temperature in the N306. :)

No.

BUT what DOES happen is the electric heating element is turned ON more than turned OFF. In other words, the control board regulates the heating element just like a PWM (pulse width modulation)control..

Fridge T stat calls for more cooling the heating element is turned on LONGER until the fridge T stat sees the correct temp..

In reality, the gas burner should also do the same, it would take some fancy variable regulator on the gas side to make a "variable flame"..

I do know on older "pilot" type RV fridges they had a fixed pilot sized flame and when cooling was needed the gas valve would open creating a larger flame.. I had one of the older fridges with a pilot that didn't have electronic control board..

My current TT HAD a RV fridge with electronic control board, never got to see how that one worked since the cooling unit had ruptured before I bought the trailer..

And as far as the OPs temp swing issue, yeah, your gonna have to live with those large temp swings.. My first TT, that one would freeze everything in the fridge section solid over night (20s in the fridge section) when outside temps dropped to 70's and swing up to 50F or higher with the daytime temps in the upper 90's..

Some of the newer RV fridges have a makeshift T stat control, basically a thermistor attached to one of the cooling fins in the fridge section, you slide it up and down the fin to control the fridge temps.. No thermistor, no control you can adjust..