E66Serious
Frigidaire Dryer E66 Error Code
The heating relay is stuck closed, causing the heater to stay on continuously and overheat.
Common causes
- Welded relay contacts on control board
- Shorted transistor driving relay
How to fix it
- Immediately unplug dryer to prevent fire hazard.
- Check if air vent is clogged – a restricted vent can cause overheating and mimic relay issues.
- Clear any lint from vent system.
⚠ When to call a pro: Always call a pro for E66 – risk of fire due to stuck heater. Do not attempt board repair yourself.
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Always unplug the appliance (and turn off the water for washers/dishwashers) before inspecting. These guides are for information only and are not a substitute for a professional repair.