EC
Frigidaire
Control Board Internal Error / EEPROM Fault
Furnace displays EC; blower may run continuously
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Safety Warning
This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.
If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.
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Possible Causes
Failed integrated furnace control, Voltage surge or brownout damage, Corrupted control memory
How to Fix / Troubleshooting
Safety: Turn off power before handling the control board.
- 1. Power reset: Turn off the furnace at the breaker for 10 minutes, then restore power. Sometimes transient faults clear with a full reset.
- 2. Check grounding and neutral: Ensure the furnace is properly grounded and neutral connections are tight. Poor grounding can cause control issues.
- 3. Inspect board: Remove the blower door and visually inspect the control board for burnt components, cracked solder joints, or moisture damage.
- 4. Surge protection: If your area has frequent power issues, consider installing a surge protector on the furnace circuit.
- 5. Replacement: If EC returns after reset and wiring checks, the integrated furnace control board must be replaced with the exact Frigidaire part number. This is best done by a qualified technician to ensure proper setup and testing.
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Repair Difficulty
Hard
4/5
Required Part
Integrated Furnace Control Board
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