Common codes include a single flash for an airflow fault (check your pressure switch)

Its split-core design allows for rapid installation on existing insulated conductors without disconnecting the circuit

providing a reliable automatic changeover when the media temperature shifts between heating and cooling cycles

Common signs include the burner failing to ignite

Fenwal 35-703920-009 Board R-410A Common codes include a singleAs a technician, you know that intermittent ignition failures are usually traced back to a failing control module. The Fenwal 35 703920 009 Ignition Control Board is a specialized 120V DSI (Direct Spark Ignition) module engineered for precision timing and flame monitoring in residential and commercial atmospheres. This Fenwal 35 70 series control utilizes a microprocessor to provide constant self diagnostics and safe start checks, ensuring the gas