Termet No Circulation / Hydraulic Distribution Problem

Radiators or underfloor heating remain cold even though the furnace appears to be running normally.

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

Air in system, Closed isolation valves, Faulty circulation pump on Termet unit, Stuck zone valve

Safety: Turn off power and allow system to cool before bleeding.

Check system pressure: Ensure pressure is within Termet’s recommended range.
Bleed air: Bleed radiators and high points to remove trapped air.
Verify valves: Confirm that all isolation and zone valves are open and actuators are operating.
Check pump operation: Listen and feel for vibration at the circulation pump when there is a heat demand.

If there is still no circulation, the pump or zone controls may need professional service.

Medium 3/5

Circulation Pump

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