When replacing a keyed blower shaft

This 120V model is identified by its blue junction box and blue lead wires

What is the primary difference between the 1609-90 and standard controllers

Key Benefits Dual-Knob Calibration: Features separate manual adjustment knobs for fine-tuning HI and LO airflow limits

Fenwal 35-665936-111 Control Els PW 17895 When replacing a keyed blowerThe Fenwal 35 665936 111 is a robust 24VAC Direct Spark Ignition (DSI) control module engineered for precise burner management in commercial and residential heating applications. Operating with a 15 second pre purge period, this microprocessor based controller ensures a clean combustion chamber before initiating the ignition sequence. It features a 4 second Trial for Ignition (TFI) and is configured for 3 ignition trials, providing reliable flame