Call Dad

What this contractor is listed for

Call Dad responded to a no-heat call at a residence in 27707. The furnace control board inside the air handler cabinet became the focus of the diagnostic process. The technician traced voltage through the terminal strip and tested relay continuity at several points. Colored wires from the thermostat and safety circuits terminated at labeled connections across the board. The purple common wire and red power leads showed secure contact without corrosion. Board-level diagnostics require methodical testing since multiple components share the same circuits. The issue turned out to be unrelated to the board itself. When your furnace stops responding to the thermostat, Call Dad can trace the problem.