The most common cause is a short circuit in the 24V secondary wiring or a failing component like a grounded gas valve solenoid

or pump systems

making it a straightforward HVAC piston replacement for field techs

or improper manifold gas pressure causing the flame to "roll out" of the burner area

Technicians often source this condenser motor 11091207SP to resolve issues with sluggish fan cycles or thermal overload failures

Nidec-US Motors 841CV Blower Motor 318423-701 The most common cause isFor mid range belt driven HVAC applications, the Nidec US Motors 841CV Blower Motor provides consistent 1 3 HP performance in standard 115V single phase systems. This split phase capacitor motor is engineered for a 48 NEMA frame size, featuring a 1 2 inch diameter shaft and a 1. 6 inch length to ensure compatibility with most existing belt driven tensioners and pulleys. Operating at a fixed 1725 RPM, it delivers stable torque for ventilators, exhaust