Thermostat frequently short‑cycles the boiler or heat pump (turns on and off every few minutes).

Safety first: No need to open the unit; adjustments are via the menu.

• Step 1 – Adjust differential: Increase the temperature differential or hysteresis in the installer menu so the system runs longer between on/off cycles.
• Step 2 – Set minimum run/off times: Configure minimum on‑time and off‑time parameters to protect the boiler or compressor from rapid cycling.
• Step 3 – Improve location: Move the thermostat away from doors, windows, or vents that cause rapid temperature swings.
• Step 4 – Check system sizing: If short cycling persists despite correct settings, consult an HVAC professional to evaluate boiler or heat pump sizing.