Lennox 49L91 Pressure Switch Els PW 17895 Common Questions: Is the AV-7600

Common Questions: Is the AV-7600 interchangeable with the AV-7600-1

reducing the number of spare parts needed on the service truck

ensuring factory-standard fitment

While light oxidation can be removed with fine steel wool or a Scotch-Brite pad

Is this compatible with Danfoss EVR series valves

Lennox 49L91 Pressure Switch Els PW 17895 Common Questions: Is the AV-7600The Lennox 49L91 is a critical safety component designed for precise furnace draft monitoring within high efficiency heating systems. This OEM Lennox Pressure Switch (also identified as 49L9101) is factory calibrated to actuate at . 51" WC and reset at 0. 61" WC, ensuring the inducer motor maintains the necessary vacuum for safe combustion and flue gas venting. Featuring a SPST (Single Pole Single Throw) configuration and a standard 1 4" barb