Originally Posted by richard5933
If the burner was firing for 16 hours, wouldn't that indicate the thermistor is working and calling for cold?
OP stated swapped to gas and 16 hrs later food compartment still wasn't cooling down
Not that GAS ran for 16 hrs.....
Bad thermistor can limit heating cycles or cause heating cycle to run in BOS (back up operation...timed based vs temp based)
Freezer is first in cooling process and heat is absorbed from freezer then absorption is done in food compartment....IF sufficient amount of ammonia has been boiled into vapor then condensed into liquid ammonia
Bad thermistor can affect how much ammonia if boiled, bad circuit board can limit heat cycles, obstructed/blocked cooling unit can affect amount of ammonia is boiled (obstruction on perk tube) or flow of coolant (obstruction between Low Temp Evap Coil and High Temp Evap Coil---freezer/food compartment)
That is why I suggested unplugging thermistor (leads on lower circuit board) and let fridge run W/O temp sensing
Free and easy test....if food compartment cools down. Replace thermistor
If food compartment doesn't. Then Force Cooling test is needed to see if cooling unit is capable of cooling freezer AND food compartment
Free and easy test but require monitoring.....Element leads wired directly to 120VAC Outlet and force cool fridge. Bypasses ALL controls so monitoring is needed. After 12hrs of element being continuously energized YES/NO if cooling unit is blocked or not
Good cooling unit.....food compartment will get 32*F or lower