HVAC Refrigeration Guide — HVACR Parts

Furnace Won't Ignite? How to Diagnose a Draft Inducer Failure

Aug 09, 2026

If a gas furnace won't start or locks out before the burners light, the draft inducer is one of the first components to check. This guide covers how to confirm an inducer failure — symptoms, voltage checks, and confirmed OEM replacement parts for York, Heat Controller, Modine, and more — before you order the wrong part.

Tags: blower motor, combustion air blower, draft inducer, Fasco A238, furnace diagnosis, furnace lockout, furnace won't ignite, Heat Controller, HVACR parts, inducer motor, Modine inducer, OEM replacement, pressure switch, S1-373-20830-001, York inducer

TXV Troubleshooting in the Field

Jul 15, 2026

A failing TXV rarely throws a fault code — it shows up as frost on the suction line, erratic superheat, or a system that won't hold temperature no matter how much refrigerant gets added. This guide walks through the five field symptoms that point to the valve (not the charge), how to confirm a bad TXV before replacing it, and how to match the right replacement by refrigerant type and equalization style — with notes on the Danfoss 068U1839, Copeland Alco 091050, and Amana-Goodman OEM valves.

Tags: Amana-Goodman, Copeland, Danfoss, Expansion Valve, Field Service, HVAC Troubleshooting, HVACR Parts, R-134a, R-22, R-410A, Refrigerant, Superheat, TXV