Drayton
Thermostat Overheating (Mechanical/Installation)
Thermostat plastic housing becomes noticeably warm during normal operation.
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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
Mounted on warm pipe chase, Installed above radiator, Excessive load wired through thermostat instead of receiver, Poor ventilation around unit
How to Fix / Troubleshooting
Safety first: Isolate mains before removing a wired thermostat from the wall.
- Check load wiring: Ensure that high-current loads (pumps, valves) are switched by the Drayton receiver or wiring centre, not directly through the thermostat if it is not rated for that load.
- Assess location: If the thermostat is above a radiator or warm pipe run, relocate it to a cooler internal wall.
- Improve ventilation: Ensure there is at least a few centimetres of clearance around the thermostat and that vents are not blocked by curtains or furniture.
- Replace if damage evident: If the plastic is discoloured or warped, replace the thermostat and correct the installation to prevent recurrence.
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Repair Difficulty
Medium
3/5
Required Part
Thermostat Housing / Mounting Location
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