Carrier HH18HA187 Limit Switch this crankarm is compatible with

this crankarm is compatible with 7/16-inch or 1/2-inch diameter damper shafts

the part should be replaced

Using it in a horizontal orientation will lead to improper drainage and potential leaks

The heavy-duty 2C style OEM sensor configuration provides high-accuracy flame sensing

ensuring seamless manifold gauge compatibility with most service sets

Carrier HH18HA187 Limit Switch this crankarm is compatible withThe Carrier HH18HA187 Limit Switch is a critical OEM replacement part designed for high limit safety monitoring in residential and commercial gas furnaces. This SPST normally closed disc style switch features a fixed 180 degree open setpoint and a 80 degree close reset point, ensuring the heat exchanger does not exceed safe operating temperatures. Engineered for automatic reset functionality, the HH18HA187 integrates seamlessly into the safety string