Lochinvar & A.O. Smith 100208380 Pressure Switch 320735-701 The Carrier HH18HA454 Limit Switch

The Carrier HH18HA454 Limit Switch is a critical safety component designed for precise thermal regulation within Carrier

this component ensures seamless mechanical and electrical integration

Using this OEM HVAC part avoids the alignment and seal issues common with aftermarket alternatives

The Sure-Flex Plus design offers significantly higher torque ratings compared to standard EPDM sleeves

Lochinvar & A.O. Smith 100208380 Pressure Switch 320735-701 The Carrier HH18HA454 Limit SwitchThe Lochinvar & A. O. Smith 100208380 Pressure Switch is a critical safety component engineered for precise combustion air proving in high efficiency boilers and water heaters. This OEM replacement part is factory calibrated to a 1. 05 inch water column (WC) set point, ensuring the integrated draft inducer or blower provides sufficient static pressure before the ignition sequence is initiated. Designed for compatibility with various Lochinvar Knight