Lochinvar & A.O. Smith 100318326 Pressure Switch R-407C it is strictly for hot

it is strictly for hot water space heating systems and should not be used on steam-generating boilers

Hard starting

Start by verifying 24V power at the control and inspecting the sparker wire (P63250) for damage or loose connections

When you're on a service call for a Carrier

featuring an updated high-durability housing for improved reliability under fluctuating thermal conditions

Lochinvar & A.O. Smith 100318326 Pressure Switch R-407C it is strictly for hotThe Lochinvar & A. O. Smith 100318326 Pressure Switch is a critical safety component designed for precise water pressure monitoring in high efficiency Noble Fire Combi Boilers and NKC series units. Engineering to detect low water pressure conditions, this switch acts as a primary fail safe, preventing dry fire scenarios and potential heat exchanger damage by ensuring the burner circuit remains open unless sufficient system pressure is established.