KESTON C34237000 3/8 INCH AUTO AIR VENT KIT.
The Air Pressure Switch, also known as the APS is a safety mechanism used to ensure the fan is fully operational. The fan prevents a build-up of dangerous gasses within the appliance, extracting them safely. The air pressure switch is tracked by the princted circuit board (PCB), ensuring that it is fully effective; if the air pressure switch is not working correctly the PCB will restrict the appliance from firing up .
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The KESTON C34237000 3/8 INCH AUTO AIR VENT KIT is a genuine, brand new Keston Boiler Spares product, covered by a Keston Boiler Spares manufacturer's guarantee.
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