Boiler not heating - Timer not set for central heating

What does Timer Not Calling for Heat mean?

The boiler is not producing heat because the external timer (if fitted) is not set to 'ON' or configured to call for central heating at the current time. The boiler will wait for a demand signal.

• Incorrect timer settings (e.g., set to 'OFF' or wrong program)
• Timer switched to 'DHW only' mode (Summer mode) instead of 'Winter' or 'CH only' mode.
• Power interruption to the timer itself.

Click steps to track your progress.

1. 1

   Check your external heating timer and ensure it is set to the 'ON' position or programmed to call for central heating.

2. 2

   Refer to the specific instructions supplied with your timer if you are unsure how to adjust its settings.

3. 3

   Ensure the timer has power and its display is working correctly.