The surface-mount design allows for flexible positioning on the blower housing

If you observe sparking along the length of the wire rather than at the electrode

Always connect the common wire to 'C'

but if the switch itself has met its service life

Modine 5H0722750005 Pressure Switch 30067439-890 The surface-mount design allows forThe Modine 5H0722750005 Pressure Switch is the official OEM replacement part for the 5H72275 5 model, engineered specifically for Modine unit heaters and furnace systems. As a veteran technician, you know that precise vacuum pressure switch calibration is critical for the furnace ignition sequence. This SPST (Single Pole Single Throw) switch is factory set to a . 64" WC (Water Column) trip point, ensuring the power exhauster has established sufficient