Is this a bad circuit board? (fridge)
Its the type that uses the resistance probe. Which is all fine and dandy. I have not measured the ohms but assume its measuring accurately. Lets pretend the temp probe was hanging off the fins. Re...
Forum Discussion
wopachop wrote:wopachop wrote:
Lets pretend the temp probe was hanging off the fins. Resistance to the circuit board is way out of spec so the fridge goes into a protective mode. Why the heck didnt it cycle all day?
What causes a fridge to go 10 hours without cycling?
Bad probe = continuous cooling?
Bad board = short cycling?
What causes 10 hours of not attempting a cooling cycle? (with fridge temp well above 40F)
Depends on what you are calling a "cycle".
RV fridges do not work in the same manor as compressor fridges.
They do not "cycle" on/off like or as fast as a compressor fridge.
RV fridge uses gravity to do it's magic, if you have ever been around any heating system that uses gravity then you would fully understand what is happening with your RV fridge.
A great example of this is a Lava Lamp.
To get the lava to move up in the lamp one must apply a lot of heat at the bottom of the lamp base (think of this as the RV fridge boiler).
The heated lava the rises to the top where it is cooler.
The lava at the top cools down and then sinks back down to the bottom.
The cycle the repeats.
In order to get the coolant to move through a RV fridge, you have to apply heat, a lot of heat. The heated coolant rises from the boiler then creates circulation in the tubing.
As such, it takes a long time for a RV fridge to cool to the desired temp. It also takes a long time to recover and stabilize after the fridge door has been opened. It can take several hrs for the fridge to recover and stabilize.
A more accurate way to describe "cycle" is to verify and measure how long the fridge burner (or electric heating element) is on compared to off..
But, with a RV fridge, the hotter it is with ambient outside temps the longer the burner must run. High ambient outdoor temps will considerably reduce the efficiency of gravity type circulation. So, it is not unusual to have a RV fridge burner run at max all day in extreme high ambient outside temps.
Your inside RV temps really do not affect a RV fridge all that much, it is the outdoor temps that can cause difficulty.
