The terminal layouts on the A421ABC-06 have been updated from the A419 series

which can accidentally enlarge the opening and cause improper combustion

Ensure the unused primary lead is properly capped to avoid electrical shorts

Is the VT3342 compatible with steam applications

What is the coil voltage for this part

Williams 7B111 Fan Blade 30067439-890 The terminal layouts on theThe Williams 7B111 Fan Blade is a critical replacement component designed specifically for Forsaire Counterflow Top Vent furnaces. This 8 blade aluminum assembly is engineered for 65,000 BTU models, including the Williams 6508 series, where maintaining precise static pressure and consistent CFM is vital for heat exchanger integrity. Featuring an 11 1 4" diameter and a 1 2" bore, this CW (clockwise) rotation blade ensures the blower assembly moves air