Lennox 34M77 Pressure Switch Els PW 17895 Durable Construction: Engineered with premium

Durable Construction: Engineered with premium metal alloys for superior resistance to soot accumulation and high-temperature oxidation

while the protective enclosure cover with 1/2" conduit knockouts simplifies wire management and enhances safety on the job site

The nickel-iron Balco element ensures high sensitivity (approximately 3 ohms/°F) and reliable performance across an operating range of -50° to 220°F (-46° to 104°C)

For technicians troubleshooting a furnace pressure switch stuck open or closed

What are the signs that my current electrode needs replacement

Lennox 34M77 Pressure Switch Els PW 17895 Durable Construction: Engineered with premiumEnsure reliable sequence of operation with the Lennox 34M77 Pressure Switch, a critical safety component designed for heating and cooling systems. This OEM Lennox furnace pressure switch is engineered to monitor draft pressure and confirm proper inducer motor performance before allowing the ignition process to begin. Featuring a precise 1. 00"wc SPST (Single Pole Single Throw) configuration, this switch actuates at 1. 00" W. C. and resets at 1. 15" W.