Nordyne 632675 Pressure Switch 321702-401 Use a jumper across the

Use a jumper across the 'Speed-Up' or 'Test' pins on the board to bypass the internal timer and verify the reversing valve and outdoor fan relay functions

The McDonnell & Miller 51-HD Mechanism (Part Number 134900) is a heavy-duty mechanical water feeder designed for low pressure steam and hot water boilers

it ensures seamless integration and field reliability for technicians servicing Nordyne

providing reliable spring return safety by defaulting to the open position upon loss of signal

Nordyne 632675 Pressure Switch 321702-401 Use a jumper across theThe Nordyne 632675 Pressure Switch is a critical safety component designed for high efficiency HVAC operations, specifically calibrated to a 1. 09" WC (water column) set point. As a veteran grade OEM furnace pressure switch, this part is engineered to monitor the pressure differential created by the inducer motor, ensuring the exhaust vent system is clear of obstructions before allowing the ignition sequence to proceed. This spst nc pressure switch