Heating Components & Equipment Ltd have all the SIT CONTROLS boiler parts you may require for your heating appliance, our boiler spares profile for SIT CONTROLS spares are as follows Automatic air vent, Burners, Casings, Control knobs, Diaphragms, Electrodes, Expansion vessels, Fans, Flow switches, Gas valves, Gauges, Heat exchangers, Injectors, Microswitches, Printed circuit boards, Pressure switches, Pressure gauges, Pumps, Temperature gauges, Thermistor sensors, Thermocouples, Thermostats, Transformers, Wiring harnesses etc, when purchasing SIT CONTROLS heating spares from Heating Components & Equipment Ltd you can guarantee you will receive a genuine manufacturered SIT CONTROLS boiler spare parts.