E7
EcoSmart
Triac / Relay Drive Fault
Display shows E7; unit may heat erratically or not at all.
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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 triac or solid-state relay on control board, Shorted element causing driver failure, Overheated power electronics due to poor ventilation, Loose heat sink or thermal compound degradation
How to Fix / Troubleshooting
Safety: This is a high-voltage, high-current fault. Turn OFF the breaker and do not attempt live testing unless you are qualified.
- Ventilation check: Ensure the EcoSmart heater has adequate clearance around it and that vents are not blocked. Overheating can damage power components.
- Inspect for damage: Remove the cover and look at the power section of the control board (triacs/relays mounted on heat sinks). Check for cracks, burn marks, or melted solder.
- Check elements first: Test each heating element for shorts to ground and proper resistance. Replace any defective element before replacing the board to avoid re-damaging new components.
- Board replacement: If visual inspection shows damage or E7 persists, the control board assembly (including triacs/relays) will usually need replacement.
- Professional help strongly advised: Because this involves power electronics and correct torqueing of high-current connections, have a licensed technician perform the repair.
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Repair Difficulty
Professional Required
5/5
Required Part
Main Control Board (Power Section / Triac Module)
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