Drayton Intermittent Boiler Interface Communication

Thermostat or Wiser app intermittently shows boiler as offline or not responding.

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.

Possible Causes

Loose low-voltage communication wiring, Electrical noise on boiler bus, Boiler firmware glitches, Poor contact in plug-in boiler module

Safety first: Isolate mains power to the boiler and HubR before touching any wiring.

Check connectors: Inspect any plug-in boiler interface modules or terminal blocks for secure seating and tight screws.
Inspect cable: Look for damage or kinks in the communication cable between HubR and boiler.
Separate from mains cables: Route low-voltage communication cables away from mains cables where possible to reduce interference.
Update boiler and HubR firmware: If supported, update boiler control firmware and ensure the HubR is up to date.

Medium 3/5

Boiler Interface / Communication Cable

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