Carrier HH19ZA156 Limit Switch 326010-701 Durable Composite Construction: The 7-blade

Durable Composite Construction: The 7-blade plastic design resists corrosion and environmental stress

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

MFT Programmability: Field-adjustable parameters allow for custom input signals

Carrier HH19ZA156 Limit Switch 326010-701 Durable Composite Construction: The 7-bladeThe 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