Q: Does the HRT3 thermostat contain a battery?

Yes , the HRT3 thermostat operates with batteries. Battery Details Type and quantity: 2 AA batteries Battery life: Up to one year Low battery warning: An icon blinks on the screen when the batteries need to be replaced Battery Replacement When replacing the batteries, complete the operation within 30 seconds to preserve your settings. The battery compartment and installation instructions can be found in the manual.

Question 1

The HRT3 thermostat has no indicator light - how can I check its operation?

Accepted Answer

The HRT3 thermostat does not have an indicator light or pilot light. It is a room thermostat equipped with an LCD screen that displays the temperature and settings - it does not control the boiler's ignition.

If your heating is not working, the problem lies with your boiler itself, not the HRT3 thermostat. The thermostat simply requests heat from the boiler based on the temperature you have set.

How to check if the HRT3 is functioning correctly:

Is the LCD screen visible and displaying numbers? If not, check the batteries (low battery indicator on the screen).
Is the rotary dial for the temperature set above the current room temperature? If so, the thermostat is functioning and requesting heating.
Check your boiler directly for pilot light issues - that is where this function is located.

If the HRT3 screen is on and functioning, but you have no heating, contact a heating engineer to inspect your boiler.

Question 2

Does the HRT3 thermostat contain a battery?

Accepted Answer

Yes, the HRT3 thermostat operates with batteries.

Battery Details

Type and quantity: 2 AA batteries
Battery life: Up to one year
Low battery warning: An icon blinks on the screen when the batteries need to be replaced

Battery Replacement

When replacing the batteries, complete the operation within 30 seconds to preserve your settings. The battery compartment and installation instructions can be found in the manual.

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