Common signs include the furnace blower running continuously without heat

ensuring all tappings for gauge glass and tri-cocks align perfectly

If you observe flame rollout

High Flow Capacity: Supports up to 1

making it a versatile 3-ton expansion valve for field replacements

Lochinvar & A.O. Smith 100208463 Tester Assembly 322027-701 Common signs include the furnaceThe Lochinvar & A. O. Smith 100208463 Tester Assembly is a critical diagnostic tool designed for service technicians to accurately evaluate variable speed fan motors in high efficiency Lochinvar heating systems and A. O. Smith air handling units. This OEM fan tester allows for rapid HVAC troubleshooting by isolating the blower motor from the control module, helping to determine if a performance issue stems from the motor's internal electronics or the