verify the supply voltage (typically 24 VDC) and measure the current loop to confirm the transducer is accurately reporting system pressure

sensor out-of-range alarms

P291-2553R

Engineered for precise fitment in specific burner and venting configurations

They are the exact same model

Heil Quaker ICP 34332903 Limit Switch 318423-701 verify the supply voltage (typicallyUpgrade your system restoration with the Heil Quaker ICP 34332903 Limit Switch, a precise OEM replacement furnace part engineered for high demand heating applications. This high limit safety switch features a 3 inch probe insertion depth, designed to monitor internal plenum temperatures with industrial accuracy. Operating with a 170 190? F temperature range, it functions as a critical L190 20F limit control, ensuring the blower assembly and heat