Carrier HH18HA296 Limit Switch 321894-709 The Reznor 63174 is a

The Reznor 63174 is a complete ventor assembly

This OEM part is a direct replacement for legacy part numbers PRS20019 and PRS20019K

meaning it cannot be overridden by holding the button down

It comes well-tested to ensure smooth and reliable operation

this permanent split capacitor (PSC) unit operates with a two-speed configuration

Carrier HH18HA296 Limit Switch 321894-709 The Reznor 63174 is aThe Carrier HH18HA296 Limit Switch is a critical OEM replacement part engineered to maintain system integrity by monitoring discharge air or internal temperatures. This assembly serves as a high limit safety device, designed to open the electrical circuit if temperatures exceed the thermal cutout thresholdtypically calibrated around 300F for specific furnace and air handler applications. By integrating this genuine Carrier part, technicians ensure