how to calculate the heat dissipated across the HVAC contactor

4,619 views · Published 25 May 2012 · 5:17 · Indexed 26 September 2026

Channel: grayfurnaceman · 2012 · Howto & Style

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A method of determining the voltage loss across the contacts of a contactor.  Voltage loss converts to heating of contacts and possible failure of the contactor.  
This video is part of the heating and cooling series of training videos made to accompany my websites: www.graycoolingman.com and 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 can be lethal, the fuels are highly flammable and high pressures are used. Know your limits.

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