Solve Dozens of Furnace Problems With This Process

Dive into the logic of an HVAC Service Tech to diagnose dozens of common furnace problems. 00:00 Introduction 00:16 Confirm Power, Fuel, Call for heat 00:28 Checking Thermostat 00:49 Confirming Power 02:03 Testing Door Switch 02:23 Confirming Fuel 02:51 Sequence 03:03 Checking 3 or 5 amp fuse 03:35 Securing Door Switch 03:46 Repowering Furnace / Time Delays 04:31 Inducer Motor / Limit Switch Problems 06:24 Inducer Motor / Thermostat Problems 07:17 Inducer Motor / Control Board Problems 07:36 Inducer Motor / Bad Motor / Jammed Cage 08:19 Pressure Switch Problems / Testing 09:31 Pressure Switch / Flue Pipe Problems 09:59 Pressure Switch / Blocked Tubing 10:27 Hot Surface Ignitor / Testing 11:40 Gas Valve / Testing / Burner Issues 12:48 Flame Sensor Problems 13:57 Blower Motor