the differential pressure mechanism is designed to monitor airflow and pressure differentials in various HVAC configurations

This specific model is designed exclusively for R-22 systems and should not be used in R-410A applications due to different pressure ratings and flow characteristics

This is an ODP (Open Drip Proof) motor

For technicians performing retrofits or coil replacements

Fenwal 35-655706-021 Ignition Control 30067439-890 the differential pressure mechanism isThe Fenwal 35 655706 021 is a microprocessor based Hot Surface Ignition (HSI) control module designed for high performance gas fired equipment. This 120VAC Fenwal ignition module features a 4 second heat up time and a 4 second Trial for Ignition (TFI) period, providing precise burner management. Engineered for safety and reliability, it operates with three ignition trials before entering a lockout state, ensuring robust flame monitoring and preventing