Heatit
Thermal Damage from Overheating Terminals
Thermostat plastic housing is discolored or slightly melted near terminals
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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
Loose terminal screws, Overcurrent through thermostat, Poor contact with solid-core conductor, Corroded copper conductors
How to Fix / Troubleshooting
Safety first: Turn OFF power at the breaker immediately. Do not continue using a thermostat showing signs of melting or burning.
Steps to troubleshoot:
- 1. Remove thermostat and inspect:
- Check all terminals for signs of overheating, burning, or melted plastic.
- 2. Inspect supply and load cables:
- Cut back any damaged or oxidized copper and re-strip insulation.
- 3. Replace thermostat:
- Install a new Heatit smart thermostat; do not reuse a heat-damaged unit.
- 4. Verify load rating:
- Ensure the connected load does not exceed the new thermostat's rating; use an external relay if necessary.
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Repair Difficulty
Professional Required
5/5
Required Part
Heatit Smart Thermostat and Associated Wiring
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