Featuring a 3-inch insertion probe

Engineered to break the 24V circuit if internal temperatures exceed the 325-degree threshold

If airflow is clear and the SWT1611 remains open while cold

Technicians should look for a "clicking" sound without contact engagement or a compressor that refuses to start even after the typical delay period has passed

Fenwal 05-129921-124 Wiring Harness Els PW 17895 Featuring a 3-inch insertion probeAs a veteran tech, you know that a reliable connection is the backbone of any furnace or boiler repair. The Fenwal 05 129921 124 Wiring Harness is a 24 inch assembly specifically engineered for high performance Fenwal ignition control systems. This OEM wiring harness features a robust multi pin connector designed to interface seamlessly with 05 and 35 series ignition modules, ensuring stable signal transmission for critical HVAC burner control