HVAC Tips

Troubleshooting the Open Limit Fault

•  Furnace,  Troubleshooting

Learn how to troubleshoot an open limit fault on a furnace.

Troubleshooting the Pressure Switch Circuit

•  Furnace,  Troubleshooting

Here Greg Brunts explains how to quickly determine which pressure switch is causing an open pressure code on the control board when the furnace has more ...

How Smart is a Pressure Switch?

•  Troubleshooting,  Furnace

Here Greg Brunts explains how to properly determine if a pressure switch has failed or is it doing what it should do.

False Codes

•  Furnace,  Troubleshooting

Here Greg Brunts explains how high resistance in the limit circuit can give a false code on the control board.

Single Stage Furnace Limit Circuit

•  Furnace,  Troubleshooting

Here Greg Brunts explains how to troubleshoot the limit circuit on a single stage furnace using a voltmeter and an ohm meter.

Prime the Traps

•  Installation,  Air Handler,  Furnace

Vent Transition – 2 inch to 3 inch

•  Furnace,  Installation

Understanding Ohms vs Continuity

•  Heat Pump,  AC,  Troubleshooting,  Furnace

Inline Drain on 95% or 96% Furnace

•  Furnace,  Installation

Voltage Drop Created by High Resistance

•  Troubleshooting,  Heat Pump,  Furnace,  AC