Furnace frequently starts and stops (short cycling), room temperature unstable

Safety: Adjust only user‑accessible settings unless you are a qualified installer.

• Check thermostat location: Ensure the room sensor or thermostat is not exposed to drafts, direct sunlight, or heat sources.
• Increase hysteresis: In the Nibe control menu, increase the temperature differential (hysteresis) so the unit runs longer per cycle.
• Enable buffer tank: If a buffer tank is installed but bypassed, ensure it is correctly integrated to increase system volume.
• Open more emitters: Open additional radiators or loops to increase load and reduce cycling.

Persistent short cycling may require system redesign by an installer.