Carrier HH19ZA965 Limit Switch

The Carrier HH19ZA965 Limit Switch is a critical safety component designed for precise thermal monitoring in residential and commercial HVAC units. Operating with a temperature range of 115-165F, this auto reset limit switch serves as a reliable thermal cutout, interrupting the burner circuit if heat exchanger temperatures exceed safe operational parameters. As the official HH19ZA965A replacement, this updated version ensures direct compatibility and seamless integration into existing Carrier original equipment and furnace assemblies. Field technicians will appreciate the compact design, which allows for streamlined installation in tight plenums and heater cabinets without requiring field modifications. This robust HVAC furnace limit switch is engineered to withstand the demanding thermal cycles of modern high-efficiency systems, maintaining system integrity and preventing over-temperature conditions that can damage heat exchangers or electrical components.

• Universal Performance: Specifically calibrated for a 115-165F temperature range to provide accurate thermal protection.
• Direct Replacement: Fully backward compatible to replace obsolete Carrier HH19ZA965A parts with the current, superior iteration.
• Automatic Reset: Features auto reset limit switch functionality, restoring operation once temperatures return to safe levels (115°F close, 165°F open).
• OEM Reliability: Built to Carrier original equipment standards to ensure longevity and exact fitment in supported furnace models.

• Is HH19ZA965 compatible with my HH19ZA965A? Yes, the HH19ZA965 is the direct manufacturer-specified replacement for the HH19ZA965A version.
• What are the open and close set points? This switch is designed to open (break the circuit) at 165°F and automatically close (reset) once the temperature drops to 115°F.
• Can I use this in any brand of furnace? While designed for Carrier, Bryant, and Payne equipment, you must verify the specific temperature ratings and mounting configuration match your unit’s technical requirements.

Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.