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Refrigerator Tips
Refrigerator

                                        

REFRIGERATOR DEFROST CYCLE DIAGNOSIS

  • 1) Unplug the refrigerator.
  • 2) With the freezer frozen down, (it must have been running at least a couple of hours to give the contacts in the defrost thermostat a chance to get cold and close) remove the evaporator cover (the cover in the freezer that covers the cooling coil)
  • 3) Plug the refrigerator in.
  • 4) Locate the defrost timer and, with a screw driver, turn the timer to the defrost mode. ( There is a slot on the timer that the screwdriver will fit in. Turn it clockwise. The refrigerator will stop running when it goes into the defrost mode.)
  • 5) Wait about 5 minutes, then see if the defrost heater is heating. It will get VERY HOT, so be careful! If it is heating, the defrost heater and defrost thermostat are good. The timer should be replaced.
  • 6) If the heater is not heating, then the timer is probably good. (While this is not true ALL of the time, in my 15 years in this business I have seen this NOT true only twice. You could still have a bad timer, but is is unlikely)
  • 7) UNPLUG THE REFRIGERATOR!
  • 8) Use a hair dryer to defrost the evaporator (cooling) coil.
  • 9) Visually inspect the defrost heater. Check for a broken or burned area on the heater. Replace the heater if you find this.
  • 10) If you do not have a multi-meter, skip to 13. If you have a multi-meter, check the resistance of the heater by disconnecting the wires from both end of the heater and, with the meter set to "OHMS", put one meter lead on each end of the heater.
  • 11) If you get no resistance reading, replace the heater.
  • 12) If you get a resistance reading, replace the defrost thermostat. (See 6 above.)
  • 13) If you do not have a mulit-meter, make sure the refrigerator is unplugged, then locate the defrost thermostat. It is a round, quarter sized part with two wires coming out if it. It usually mounts directly to the evaporator coil.
  • 14) Make a note of how each wire is attached to the thermostat.
  • 15) Remove all wires from the thermostat.
  • 16) Using a wire nut (you probably removed two of them to remove the wires) connect ALL of the wires that WERE attached to the thermostat together. (NOT THE WIRES THAT ARE MADE ONTO THE THERMOSTAT, BUT THE WIRES THAT WERE ATTACHED TO THE THERMOSTAT)
  • 17) Plug the refrigerator back in. Make sure the timer is still in the defrost mode.
  • 18) Wait a couple of minutes, then check to see if the heater is heating. It will get VERY HOT, so be careful.
  • 19) If the heater is heating, replace the thermostat.
  • 20) If the heater is not heating, replace the heater. (See 6 above)
Admiral / Maytag / Norge / Magic Chef / Montgomery Wards  Top Mount
defrosttimer.jpg (61112 bytes) Sample Admiral / Maytag / Norge / Magic Chef / Montgomery Wards  Top Mount
admref8.jpg (65808 bytes)

Note: Heaters are wired in series.
They can be ohmed out from the 
small brown junction board
They either have continuity or they
do not. They are either good  or bad.

mwrefcomp.jpg (99087 bytes)
Note : Some defrost timers on 
These models in front as shown
and some are on the back right or
left lower rear corner.

 

Sample Montgomery Wards / Admiral / Norge / Magic Chef Side by Side
Freezer Section
mwdefrostheaters.jpg (112676 bytes)

Frigidaire

Sample Frigidare with coil under freezer floor
frigi7.jpg (74685 bytes)
Sample Frigidaire with coil on back wall
frigi12.jpg (68917 bytes)

Whirlpool

Sample Whirlpool Ref Top Mount
wp_ref8.jpg (120929 bytes)

 

wp_ref7.jpg (100524 bytes)

Sample Whirlpool Ref Side by Side
wpsxsrefcoil.jpg (119257 bytes)

 

Newer Side by Sides
wp_ref_defrost_timer_1.jpg (44941 bytes)
   
   
   

 

 

 


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