Ideal
Heat Damage from Overcurrent or Loose Connection
Thermostat plastic housing discoloured or warped near terminals
Advertisements
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.
Advertisements
Possible Causes
Loose live terminal arcing, Overloaded relay contacts, Incorrectly sized cable causing heat build‑up
How to Fix / Troubleshooting
Safety first: Immediately isolate power to the heating controls. Do not continue using a thermostat showing heat damage.
Steps:
- 1. Remove thermostat: Inspect the backplate and wiring for charring, melting, or soot.
- 2. Correct wiring: Replace any damaged cable and ensure the correct conductor size is used. Tighten all terminals firmly.
- 3. Reduce load: If the thermostat was switching multiple valves or pumps, reconfigure the system to use an external relay or wiring centre.
- 4. Replace backplate and thermostat: Fit new Ideal backplate and thermostat head, following the manufacturer's wiring diagram.
- 5. Have system inspected: Consider having a qualified electrician or heating engineer inspect the circuit for safety.
Advertisements
Repair Difficulty
Professional Required
5/5
Required Part
Ideal Smart Thermostat Backplate
Check Price on Amazon
We may earn a commission from links on this page.
Advertisements