Common Questions & Technical Insights Why is my furnace not starting even with the door closed

Works on all types of round copper

upgrading to a 40VA transformer is often recommended for systems with modern smart thermostats or multiple zone dampers that exceed the capacity of original 30VA units

meeting the rigorous safety requirements for commercial and industrial installations

When used with plenum-rated M9208-GGA-2 actuators

Reznor 201158 Pressure Switch Els PW 17895 Common Questions & Technical InsightsThe Reznor 201158 Pressure Switch is a critical safety component designed for precise combustion air monitoring in high capacity gas fired unit heaters. Engineered for a setpoint of 1. 10" WC, this SPST (Single Pole Single Throw) vacuum switch verifies that the inducer motor is moving sufficient air to ensure safe venting and combustion before the ignition sequence initiates. This specific model features dual 1 4" barb connections, allowing for