Rayburn Pump Over Run Thermostat Stat R2502

The pump overrun is a safety and efficiency feature that comes into play when the Rayburn stove or cooker is used for heating water for central heating. When the stove or cooker is not being used for cooking, but the central heating system is still on, the pump overrun function ensures that the water within the boiler and heating system continues to circulate for a short period after the stove has been turned off.