Trane SWT2945 Limit Switch 322838-754 if using the 12A39 vent

if using the 12A39 vent limiter

verify your shaft diameter against the P80420 specifications to ensure compatibility without the need for additional bushings

What are the signs that a Carrier LA22RA100 blower wheel needs replacement

Direct Cross-Reference: Serves as the official replacement for legacy part number 3L09-15 and ICP HH12ZA260

Trane SWT2945 Limit Switch 322838-754 if using the 12A39 ventThe Trane SWT2945 is a professional grade stainless steel limit switch engineered for high limit protection in commercial HVAC systems, including air handlers, rooftop units, and fan coils. As a critical safety component, this 200F high limit switch is designed to "open on rise," effectively interrupting the control circuit when air temperatures exceed the 200 degree threshold. This ensures system integrity and prevents potential damage to the heat