1984 panasonic fridge defrost timer

USUALLY LOCATED IN THE FRIDGE AT MIDDLE TOP BUT SOMETIMES CAN BE FOUND IN THE FREEZER ALONG THE WALL

hello , hope this helps
your model shows that your model has a main board . the defrost timer is now a main board and everything runs through that board. behind the ref . square cut out by the btm with 6-8 screws that hold the cover in place.

Normally the auto defrost timer is placed close to the main compressor unit and all you need to look is a the back panel, move the fridge forward and check at the base section where the timer will be found. A quick check for the connection and the working can be confirmed if the stepper motor is not working to move forward. If so you need to replace.

Hi,

Check out these tips...they can help you figure out whats going wrong with yourrefrigerator and why it is not cooling

Refrigerator not Cooling or Fridge not Cooling

How to Defrost Refrigerator Defrost Timer Problem

Water Running in refrigerator from Freezer

heatman101

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Hi, I think Your model number is HSS25IFMDCC . There is no defrost timer on your refrigerator, main relay board controls defrost cycles in this fridge. main board p/n WR55X10942 But I suggest to check on heater and defrost switch first - more common problem on this refrigerators. here is my video. hope it helps.

Hi,

Check out these tips...they can help you figure out what is going wrong with your refrigerator and why it is not cooling

Refrigerator not Cooling or Fridge not Cooling

How to Defrost Refrigerator Defrost Timer Problem

Water Running in refrigerator from Freezer

Refrigerator or Freezer not Cooling or Getting Cold

heatman101

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 In most newer models the timer has been replaced by an electronic control board.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.

Hello,

The most common fridge "not cooling" problem is a frost free failure. Remove the access panel in the freezer section to expose the evaporator coils. If the coils in the freezer section get plugged up with frost, this frost will block the evaporator fan motor from blowing the cold air around. The fan blade can also hit this frost and either become noisy or stop altogether. Locating the defrost timer can be tricky....they are often hidden behind the back bottom corners of the fridge at the bottom, in the last few years the timers have been located in the ceiling of the fresh food section, and some behind the cold control cover. Once you locate the defrost timer, slowly turn the screw like wheel in the middle of the defrost timer with a straight screwdriver until the fridge shuts off. You are now in defrost. If the defrost heater(s) comes on now, replace the defrost timer and defrost thermostat. If the heater(s) does not come on, you can ohm test the defrost heater for continuity or volt test for 120 volts to the heater(s). If you have no power to the defrost heater(s) you can also bypass the defrost thermostat to see if the defrost heater will come on, join the 2 wires together to bypass the defrost thermostat. If the heater now comes on, replace the defrost timer and defrost thermostat. If the heater itself is bad, defrost the fridge with a hair dryer, replace the defrost heater* and defrost thermostat. If the defrost timer seems "hot" to the touch or is noisy ( like a ticking or screeching noise )...replace it.

Would also appreciate if you could provide us the model number of your fridge so that if the above solution does not resolve your issue would look into the matter specific to your type of model.

I am sure this solution would help you to resolve the issue.

God Bless

your defrost heater or timer is not working . rotate you defrost timer until it clicks and check if its is defrosting if it is let it defrost for about 10 mins and turn the timer some more to take it out of defrost. replace timer

First point: The entire fridge is cooled by the freezer section. A fan blows air across to the food section.
2) Every 8 hours or so, a timer shuts off the compressor cycle, and starts up a heater to defrost the freezer coils. If the heater(s) are burnt out, or if the safety thermostat (to prevent overheating) is open, then you will have no defrost. The coils will frost up and eventually prevent airflow to the food section. Milk goes sour.
3) In rare circumstances, the timer itself can stall. This cause the same symptoms as above, but this is not as common as the other 2 causes of No Defrost.
Sequence: Check heater continuity. Check safety thermostat continuity while cold. Check defrost timer operation.
Hope this helps. I am a journeyman with 39 years exp. Happy New Year.