E
e66
Moderate
Electrolux · Dryers
Heater Relay Failure
Quick Answer
Error code E66 on your Electrolux Dryers means: Heater Relay Failure. This is usually fixable — see the step-by-step guide below.
Affected Models
Likely Causes
  1. Heater relay on the main control board has welded contacts (stuck on) or is permanently open
  2. Repeated power cycling has degraded the relay contacts over time
  3. Heating element drawing excessive current caused the relay to overheat
  4. Power surge damaged the relay driver circuit on the control board
How to Fix It
1
Disconnect power and access the main control board under the dryer top panel
2
Inspect the control board for visible burn marks, melted plastic, or discoloration near the heater relay
3
Test the heating element for a short to ground that may have caused the relay to fail
4
If the element is normal and the board shows relay damage, replace the main control board
5
After replacement, monitor the first few cycles to ensure the heater cycles on and off properly
Pro Tip
This fix requires some technical knowledge. If you're unsure about any step, consider contacting support or a qualified technician.
Parts You May Need
Electrolux main control board (part #137070860)
Heating element (part #137234600, if it caused the failure)
Related Error Codes
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