Carrier HH19ZA150 Limit Switch 320819-301 setting the pressure differential set

setting the pressure differential set point is straightforward—no need to remove the cover during routine maintenance

the mechanical assembly is compromised and requires immediate replacement

Verify mounting plate dimensions and terminal clearance before attempting use on other burner brands

NEMA 2 Protection: Constructed to withstand typical mechanical room environments with a durable

OEM Compatibility: Specifically engineered for York 33-inch 95%+ AFUE condensing furnaces (80

Carrier HH19ZA150 Limit Switch 320819-301 setting the pressure differential setThe Carrier HH19ZA150 Limit Switch is a critical OEM safety control designed to monitor discharge air and heat exchanger temperatures in Carrier, Bryant, and Payne furnaces and air handlers. This auto reset high limit switch is engineered with a pre set trip point that opens at 150F to interrupt the burner circuit or blower motor, preventing hazardous overheating. Once the internal temperature closes at 110F during the cooling cycle, the switch