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The 143-16-021-06 is color-coded orange
or a total failure of the 24V signal to pass through the Normally Open (NO) or Normally Closed (NC) poles
The R06740 comes factory-set to specific pressure constants
replacing the 381-356-577 is the standard procedure to restore ignition sequence
Fenwal 35-530501-003 Control Refrigerant The 143-16-021-06 is color-coded orangeThe Fenwal 35 530501 003 is a microprocessor based 12VDC Direct Spark Ignition (DSI) control module designed for precise burner management in specialized heating applications. This rugged atmospheric ignition board is the direct replacement for 05 152436 053, though technicians should note the requirement to transition the high voltage termination to a 1 4" spade connector. Engineered for efficiency in 12V DC environmentssuch as RV furnaces, mobile
