Immergas External Safety Device Intervention (e.g., flue thermostat, safety chain)

Furnace shows 60, no heating, may be associated with external safety devices

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

Open external safety thermostat, Tripped flue safety device, Wiring fault in safety loop

Safety: Identify and correct the underlying safety issue before resetting any device.

Steps:

1. Identify external safeties: Check installation documentation for any additional safety thermostats or limit devices wired to the boiler.
2. Inspect devices: Look for manual reset buttons on external thermostats and reset only after confirming there is no overheating or blockage.
3. Technician checks: Verify continuity of the safety loop and correct wiring. Replace faulty devices.

Hard 4/5

External Safety Thermostat

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