Baxi Mild Overheating / High Load Operation

Thermostat or receiver casing is unusually warm to the touch 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

Receiver installed in poorly ventilated space, High ambient temperature, Slightly overloaded relay switching multiple circuits, Dust accumulation reducing heat dissipation

How to Fix / Troubleshooting

Safety first: If the casing is very hot or there is any smell, switch off power immediately. Otherwise, proceed with caution.

Steps:

  • 1. Improve ventilation: Ensure the receiver is not enclosed in a sealed cupboard. Provide ventilation slots or relocate it to an open area.
  • 2. Check load: Confirm that the receiver is only switching the control circuit as specified by Baxi, not directly powering pumps or large loads beyond its rating.
  • 3. Clean dust: With power off, gently remove dust from vents and around the unit.
  • 4. Monitor temperature: After changes, monitor the temperature over several heating cycles.

When to call a professional: If the unit remains excessively hot, an internal fault may exist and the module should be replaced.

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Repair Difficulty

Medium 3/5

Required Part

Baxi smart thermostat receiver module
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