Thermostat or Wiser app shows heating on, but radiators are only lukewarm and boiler cycles rapidly.

Safety first: Control setting changes are low risk; do not open mains devices without isolating power.

• Adjust cycle rate: In the Drayton thermostat or Wiser app, set the cycle rate appropriate for your boiler type (e.g. 6 cycles/hour for gas boilers).
• Increase minimum on-time: Set a longer minimum on-time to reduce very short firing periods.
• Check boiler settings: Ensure boiler anti-cycling and flow temperature settings are compatible with TPI control. Consult the boiler manual.
• Observe performance: After adjustments, monitor for longer, more stable heating cycles and improved radiator temperature.