or a failing blower capacitor that is preventing the motor from reaching full RPM

Common failure points in these units include capacitor degradation

this is an OEM part specifically optimized for Carrier

making it a preferred choice for residential and light commercial HVAC furnace repair

providing consistent static pressure performance that off-the-shelf induction motors simply can’t match

Trane SWT3927 Limit Switch 322838-752 or a failing blower capacitorThe Trane SWT3927 Limit Switch is a critical safety component designed for precise thermal regulation in residential and commercial forced air systems. This L155 60F limit switch features a cutout temperature of 155F and a 60F differential, ensuring the heat exchanger does not exceed safe operating parameters. When the plenum temperature hits the high limit setpoint, this genuine OEM Trane part interrupts the burner circuit, preventing equipment