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and other HFC/HCFC blends
It ensures the damper returns to its default "normal" state (usually closed) during power interruptions
This kit is essential for contractors performing retrofits or repairs where the standard actuator drive may not align with legacy crank arm setups
opening on pressure fall to prevent evaporator freeze-ups or compressor cavitation
Which direction does the fan blade rotate
Modine 5H0794410009 Pressure Switch 30067439-890 and other HFC/HCFC blendsThe Modine 5H0794410009 Pressure Switch is the official OEM replacement part for legacy part number 5H79441 9. Specifically calibrated to a 0. 80" WC set point, this SPST (Single Pole Single Throw) air pressure switch is a critical safety interlock for Modine unit heaters, including the HD100, HD125, and PTS200 series. Its primary function is to verify that the inducer motor is creating sufficient negative pressure to safely vent combustion gases