This dual pressure switch is designed to communicate two distinct pressure states to the control board

This 10x9 blower wheel features a 1/2 inch bore and is calibrated for clockwise (CW) rotation

ensuring the electrical ratings (up to 25A) and physical footprints match the original 29662 part number

9°F to prevent significant fluctuations and improve efficiency

Greenheck 386410 Control Board 320788-702 This dual pressure switch isThe Greenheck 386410 Control Board is a high precision, OEM replacement ignition module designed for 24V DG (Direct Gas) Pilot systems. Engineering as a direct drop in for the C662D9A 2D, this board manages the critical timing and sequencing of HVAC ignition cycles to ensure safe and efficient gas fired heating. For veteran technicians, this module provides a reliable solution for units exhibiting erratic firing, intermittent pilot failure, or "no