Lennox 78L2701 / Armstrong 45653-001 Furnace Control Board – GCI-2A Blower Control

HVAC tech or DIYer?

Here's a used Lennox furnace control board, also compatible with Armstrong systems.

Part numbers include 78L2701, 45653-001, and HB-01717DA.

Model GCI-2A, it's a blower control board professionally removed from a working unit.

Cosmetically clean and fully functional.

Works with heat pump and standard furnace systems.

If your furnace is acting up, this could be the fix without paying for new.

Check your model and compatibility.