Heliocol
Overheating Electrical Component in Solar Control Circuit
Strong plastic or burning smell near equipment pad when solar engages.
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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
Overloaded valve actuator, Failing relay with high resistance, Loose electrical connection causing arcing, Incorrect voltage supplied to actuator
How to Fix / Troubleshooting
Safety first: Immediately turn off power at the breaker if you smell burning. Do not continue to operate the system until inspected.
- Inspect actuator: Check the solar valve actuator for signs of overheating, melted plastic, or discoloration. Replace if damaged.
- Check wiring connections: Tighten all screw terminals and wire nuts in the controller and at the actuator to eliminate hot spots.
- Examine relays: Look for relays with burned contacts or heat discoloration on the PCB. Replace suspect relays or the entire board.
- Verify voltage: Confirm that the actuator is receiving the correct voltage (e.g., 24 VAC) and not line voltage if it is a low-voltage model.
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Repair Difficulty
Hard
4/5
Required Part
Solar Valve Actuator
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