or if the fan runs continuously after the heat exchanger has cooled

connect to the "H" inlet and leave the "L" inlet open to the atmosphere

Air Venting Capability: Automatically bleeds air and non-condensable gases to prevent system air-binding and localized cold spots

How should the probe be positioned for the best accuracy

Carrier LH680030 Ignitor Kit R-410A or if the fan runsThe Carrier LH680030 120V Ignitor Kit is a critical service component designed for high reliability ignition in compatible Carrier gas furnaces. Built to withstand the rigorous cycling of modern heating systems, this hot surface ignitor serves as the authorized 120V replacement for legacy LH33WZ059 ignitors. For a veteran HVAC technician, this kit is the standard solution for resolving common "furnace not heating" service calls where the flame sensor