Carrier LA680571 Blower Wheel 320788-704 this 150-550°F black knob is

this 150-550°F black knob is typically included to match the factory-calibrated dial range of the Robertshaw 4200 series

Upon sensing the pilot flame

Allanson ferromagnetic transformers are designed for constant duty

Review technical specifications carefully

The SPDT configuration (Single Pole Double Throw) provides both a normally open (NO) and normally closed (NC) contact set

Carrier LA680571 Blower Wheel 320788-704 this 150-550°F black knob isThe Carrier LA680571 Blower Wheel is a high performance OEM replacement part designed for precision air movement in Carrier, Bryant, and Payne HVAC systems. Engineered by Lau (MPN: 00840393P), this double inlet centrifugal blower wheel features a 1 2" bore for secure shaft mounting. With an outer diameter of 12 3 4" and a width of 12 1 2", it is constructed from heavy duty galvanized steel to ensure dynamic balance and minimize vibration during high