two-wire resistance output device

which is typically utilized for water or glycol

and fan speed behavior during the off-cycle

the Robertshaw 4075-029 is multi-fuel compatible and rated for Natural Gas

For contractors performing a system overhaul or AC repair

Lennox 25M60 Rollout Switch 319825-402 two-wire resistance output deviceThe Lennox 25M60 Rollout Switch is a critical safety component designed for precise thermal monitoring in residential and light commercial gas furnaces. This OEM Lennox replacement part features a factory calibrated 210 degrees F trip point, ensuring the system shuts down immediately if a flame rollout condition is detected outside the heat exchanger. Engineered with a Single Pole Single Throw (SPST) configuration, the 25M60 rollout switch functions