Boiler cycles on and off rapidly, with short run times and frequent starts.

Safety first: Adjust only user-accessible settings unless you are a qualified technician.

• Check thermostat location: Ensure the room thermostat is not located near heat sources or in draughts, which can cause rapid temperature swings.
• Adjust hysteresis: If the thermostat allows, increase the temperature differential (hysteresis) to reduce cycling.
• Enable anti-cycling (if available): Some Elnur boilers have an anti-cycling time parameter. Increase this within recommended limits.
• Increase system volume: Adding a buffer tank or additional radiators can help if the boiler is significantly oversized.