Essential for troubleshooting furnace lockout codes related to primary limit circuit opens

place the meter in series with the flame rod lead

eliminating the need for mounting modifications during professional service calls

the B55 is preferred for its quiet performance

the K-AM25 provides the direct-coupled reliability required for precise airflow control and tight damper close-off

Fasco 50748-D700 Blower 318518-761 Essential for troubleshooting furnace lockoutThe Fasco 50748 D700 Blower is a high performance centrifugal blower designed specifically for demanding HVACR applications, including draft induction and localized ventilation. Operating at 115V and a nominal 2900 RPM, this shaded pole blower provides a reliable 65 CFM of free air displacement. As a veteran grade OEM replacement motor, it is engineered for drop in compatibility with various cross references, including Heat n Glo models 7021 4814 and