An "OL" or infinite reading indicates an open winding that requires immediate replacement

replacing a failing combustion air blower is the standard corrective action

Why is my unit locking out after installation

The Carrier HK02YB063 Pressure Switch is a critical OEM safety component engineered for high pressure cutout protection in residential and commercial HVAC systems

this part ensures optimal airflow by managing the blower activation cycle and providing critical high-limit safety protection

Lochinvar & A.O. Smith 100208625 Wire Harness R-22 An "OL" or infinite readingThe Lochinvar & A. O. Smith 100208625 Wire Harness is a critical OEM component for maintaining the electrical integrity and communication between high efficiency condensing boiler controls and peripheral devices. Built as a direct replacement motor wiring harness, this assembly ensures consistent signal transmission for Lochinvar Knight and A. O. Smith residential boilers. This multi pin connector harness is engineered to withstand the thermal stress