How gas furnace pressure switches work

Explanation of the gas furnace pressure switch.  Disassembly of switches with a description of the parts.  The use of the pressure switches as a control to monitor conditions in the combustion chamber are covered.  Troubleshooting of pressure switch related problems.
This video is part of the gas furnace series of training videos made to accompany my website: www.grayfurnaceman.com to pass on what I have learned in many years of service and repair. If you have suggestions or comments they are welcome.
If you are a homeowner looking to repair your own appliance, understand that the voltages and fuels used can be lethal and can cause a fire or explosion. Know your limits.

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