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Good day, The defrost system has had another failure. The system is made up of 3 parts. The first 2 are located in the freezer behind the rear panel. They are the main heater which is a calrod unit mounted to the bottom of the cooling coil, and second, a defrost thermostat, which is a small round disk which is clipped to the top of the same coil. Both can be checked with an ohm meter. Unplug the machine, and while it is still cold, check both with the meter. The thermostat should check zero ohms, the heater no more than 30 ohms. The thermostat is usually the culprit, with the calrod heater failing rairly. If both check O.K. then it is the adaptive defrost control, which is located in the roof of the fresh food compartment. It fails fairly often, and is the most expensive.
With the complete model number, call your local appliance parts house for prices.
The fridge gets its cold air from the freezer through a vent(damper)
between the freezer and fridge.The fan in the freezer blows air through
it.There is a flap you adjust with the
fridge temp. control. Make sure it's opening and closing when you adjust the
fridge temp .
If the evaporator coils behind the back panel of the freezer
are icing up because of auto defrost failure that will stop the circulation of
cold air and eventually affect the freezer too.
check defrost timer, defrost heater, defrost thermostat. In
most newer models the timer has been replaced by an electronic control board.
If the heater and thermostat are ok it’ll be the control.
You can turn the defrost timer till it clicks
and everything shuts down. The heater should now come on. If it does, replace
the timer. If it doesn't, check the heater and defrost thermostat. Turn the
timer again till everything starts back up to end the defrost cycle.
Hi: Did you check the defrost heater itself? I checked Jennair and Sears parts to no avail. If you didn't check the heater it will be at the bottom of the freezer behind where you removed the back cover. A glass tube with a coil in it. If the coil or tube is broken replace that insead. I hope I helped, Jeff I found a website with the defrost timer, but not the location of the timer on the fridge. http://www.appliancepartsworldwide.com/store_SearchResults.aspx?S=1131392&ST=PBM
Side by side have two compressors which are sometimes seperately controlled. The defrost timer is normally a part of a printed circuit board and not a serviceable item. The defrost bi-metal thermostat would be found on the freezer side behind a cover panel and is attached directly in contact with the evaporator (the thing with fins like a radiator) tubing. The function is to prevent the freezer going into defrost mode until the coil tubing is below -5 degrees celcius.
my 7yr old roper refrigerator top freezer stopped cooling and freezing but the light was still on with no fans. I dropped the thermostat cover and jumped the thermostat wires,no help . then i removed the wiring harness from the defrost timer and jumped the #1and #4 .She kicked off. I then replaced the defrost timer and it is running fine now