DEFROST HEATER ERROR
This error code may be displayed as either E rdH, or E fdH, reflecting Fresh food area, or Freezer area, respectively.
Cause
Defrost Failure, the Defrosting Sensor does not reach 40° within 80 minutes after starting defrost. Short or disconnection of the Heater Circuit.
Solution
Check the wiring and connections at Defrost Controller (Evaporators), and at the Main PCB.
DETAILS BELOW:
24 Responses
OL defrost freezer heater, part replaced, tested fine.
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No resistance on defrost heater
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Replaced fresh food Evap, unit had a sealed system issue as well
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Bad defrost heater in side by side
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Undocumented AFAIK
1. If freezer is over 45F, you cant enter TEST 3. (plug in a test thermistor and put in ice in a plastic bag)
2. In a dual evap system in TEST 3, the first press will test FF DEF first, then another press will test FZ DEF.
1) Correct, depending on model, if the defrost sensor is reading above 46-55F the unit will skip the defrost step in test mode.
2) Test 1 runs full cooling to both evap coils, Test 2 runs the Refrigerator Section evap only, Test 3 energizes both defrost heaters at the same time when the screen shows “33 33” for dual evap models. Here is a link that explains in better detail for our most popular dual evap models: https://lgtestmodes.com/refrigerator5/
Thanks!
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