Carrier HH19ZA156 Limit Switch 326010-701 making it ideal for older

making it ideal for older 4-wire systems where a common wire is unavailable

the components handle differential pressure ranges typical in water

This relay is primarily utilized on Secop (formerly Danfoss) SC and NF series compressors operating on 115V power supplies

Verify that the inducer motor is reaching full RPM and check the vacuum tubing for cracks

This high capacity relief valve is a standard choice for commercial boiler maintenance

Carrier HH19ZA156 Limit Switch 326010-701 making it ideal for olderThe Carrier HH19ZA156 Limit Switch is a critical OEM safety component designed for precise thermal regulation within Carrier, Bryant, and Payne furnace assemblies. This normally closed disc style switch acts as a primary high limit safeguard, engineered to interrupt the electrical circuit and terminate the heating cycle when internal plenum temperatures reach the 155F open setpoint. Once the heat exchanger cools to the 105F close setpoint, the