Lochinvar & A.O. Smith 100166090 Pressure Switch 320074-702 depending on your specific control

depending on your specific control module's requirements

this direct replacement pilot ensures the furnace ignites reliably to maintain optimal indoor temperatures during peak heating seasons

secure fit and reliable temperature regulation

While some sources list cross-compatibility

this unit ensures compliance with local plumbing codes while protecting against thermal expansion and pressure spikes in potable water applications

Lochinvar & A.O. Smith 100166090 Pressure Switch 320074-702 depending on your specific controlThe Lochinvar & A. O. Smith 100166090 Pressure Switch is a critical safety component designed for high efficiency boilers and water heaters. As a veteran technician knows, this OEM replacement part is essential for verifying proper blower operation and flue venting before the ignition sequence begins. It functions by monitoring the differential pressure within the combustion chamber, ensuring that the combustion air blower is moving sufficient air to