The 1171917 is specifically listed for high-efficiency 90%+ AFUE models across the C9MPD

and furnace flash code errors

The Bradford White 239-47463-01 Kit is a direct OEM replacement designed specifically for the Icon System gas control valve platform

reducing the risk of false alarms

Johnson Controls A28PJ-1 Agricultural Thermostat Els PW 17895 The 1171917 is specifically listedThe Johnson Controls A28PJ 1 is a commercial grade two stage temperature control engineered for precision in demanding environments such as livestock confinement, nurseries, and greenhouses. This agricultural thermostat features two SPDT switches and a liquid filled, 1 3 8" x 2 1 4" coiled sensing bulb for high accuracy response. Built into a rugged NEMA 4X enclosure, the unit resists moisture, dust, and corrosive vapors common in barn and dairy