Fenwal 35-615516-111 Module 340155-7024 or a blocked exhaust vent

or a blocked exhaust vent causing flames to "roll out" of the combustion chamber

Constructed with high-grade aluminum or copper tubing and enhanced fins

When diagnosing ignition failures or erratic temperature cycling in A

For technicians performing maintenance on 90% AFUE units

Fenwal 35-615516-111 Module 340155-7024 or a blocked exhaust ventThe Fenwal 35 615516 111 is a high performance 24 VAC microprocessor based direct spark ignition (DSI) control module optimized for precision burner management in gas fired heating systems. This veteran grade HVAC ignition control is engineered with an integrated inducer blower relay, simplifying the wiring stack while ensuring robust control over the combustion process. Specifically designed for applications requiring a 15 second pre purge and inter