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this 3amp control board coordinates indoor and outdoor units to maintain precise temperature setpoints across four independent zones
which enhances reliability under high-cycle conditions
Remember to recalibrate the calibration screw in the center of the gas cock plug if the housing is repositioned
Contractor-Grade Durability: Constructed to withstand the constant thermal cycling and high-heat environments of commercial water heating applications
Common Questions What are the symptoms of a failing 100208550 high limit sensor
Siemens Combustion QRA4M.U Scanner L99H008 this 3amp control board coordinatesThe Siemens Combustion QRA4M. U is a high sensitivity UV flame scanner engineered for the rigorous supervision of gas or oil flames and ignition spark proving in intermittent burner operations. As a veteran grade flame detector, this sensor utilizes a specialized UV sensitive cell with two electrodes designed to ignite upon detecting radiation within the 190 to 270 nm spectral range. This ignition triggers the necessary current in the flame detector