Wiser by Drayton
Normal Relay Operation or Relay Wear
Clicking or buzzing noises from the Heat HubR when heating or hot water turns on and off.
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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
Mechanical relay switching noise, Slightly loose mounting surface amplifying sound, Relay nearing end of life causing louder clicks, Vibration transmitted through wall
How to Fix / Troubleshooting
Safety: Isolate mains power before touching the Heat HubR.
- Assess noise level: A single click when heating or hot water turns on or off is normal. Continuous buzzing or chattering is not.
- Check mounting: Ensure the Heat HubR is firmly fixed to a solid surface; loose mounting can amplify noise.
- Inspect for chattering: If the relay chatters rapidly, there may be a control fault or loose wiring; have a qualified engineer inspect the wiring and Heat HubR.
Persistent abnormal relay noise may indicate relay wear; replacing the Heat HubR is usually the practical solution.
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Repair Difficulty
Medium
3/5
Required Part
Wiser Heat HubR heating relay
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