Immergas DHW Comfort Function Misconfiguration

Thermostat does not control domestic hot water comfort mode as expected; DHW temperature remains unchanged

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Possible Causes

DHW control disabled in thermostat, Boiler not configured to accept DHW commands from BUS, Incorrect DHW schedule, DHW priority settings on boiler overriding thermostat

How to Fix / Troubleshooting

Safety: Only change user-accessible parameters; for installer menus, consult a technician.

  • Step 1 – Enable DHW control: In the thermostat menu, ensure DHW comfort or scheduling is enabled.
  • Step 2 – Check schedule: Verify DHW time periods and temperatures are correctly programmed.
  • Step 3 – Boiler settings: On the Immergas boiler, confirm that DHW is set to be controlled via BUS/thermostat if applicable.
  • Step 4 – Priority logic: Review boiler DHW priority settings; some modes may ignore external DHW commands.
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Repair Difficulty

Easy 2/5
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