Thermostat rapidly cycles the heating on and off in short bursts, causing wear on the boiler or relay.

Safety: No mains work required for parameter changes; turn off power if relocating the thermostat.

Steps:

• Adjust cycle rate: In advanced settings, reduce the number of cycles per hour or increase minimum on/off times to suit your boiler or underfloor system.
• Relocate thermostat: Move the thermostat away from drafts (doors, windows, vents) that cause rapid temperature fluctuations.
• Enable anti-short-cycle: If available, enable anti-short-cycle protection in the thermostat settings.

Outcome: If short cycling persists despite correct settings and placement, the thermostat's control algorithm may be defective; consider replacement.