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the MP843D001 integrates seamlessly into existing pneumatic loops
this board provides a reliable drop-in furnace circuit board solution that maintains the integrity of the original equipment manufacturer (OEM) sequence of operation
Common Questions How do I know if the ECO has tripped on my 100108951 thermostat
eliminating the need for external capillary routing
Is an upstream regulator required
Lennox 51M87 Pressure Switch 320734-701 the MP843D001 integrates seamlessly intoThe Lennox 51M87 is a precision engineered furnace pressure switch designed for critical venting safety within Lennox HVAC systems. This 1. 6" WC SPDT N. O. pressure switch functions as a fail safe, ensuring the inducer motor is generating adequate static pressure before allowing the ignition sequence to proceed. The 51M8701 is the identical direct replacement, maintaining the exact factory set point of 1. 60 inches of water column. As a Single Pole
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