Common Questions: How do I know if my Armstrong A5345 thermostatic air vent has failed

ensure the mounting surface is completely free of old gasket residue and debris to achieve a professional-grade seal

you must trigger the memory clearing sequence (refer to the technical manual) to allow the AUTO stroke calibration to run again

this aluminum pilot tube is designed to handle both fuel types

it is part of the 265 series known for flexible HVAC pressure monitoring configurations

Lennox 75M20 Pressure Switch 322838-752 Common Questions: How do IThe Lennox 75M20 Pressure Switch is a critical safety component engineered for high altitude gas furnace applications, specifically calibrated for elevations between 4501 and 7500 feet. This OEM Lennox replacement part, also identified as 75M2001, monitors the inducer motor's static pressure to ensure the combustion air system is clear and operational before allowing the ignition sequence to initiate. With a precise fixed set point of 0. 75" WC (water