Finding Low Voltage Shorts Fast! HVAC Troubleshooting!

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In this HVAC Training Video, I show How to Quickly Find Low Voltage Shorts with a Multimeter! Once you know where to look and how to divide the wiring, troubleshooting the problem can be done fast! Supervision is needed by a licensed HVACR Tech while performing tasks as Experience and Apprenticeship garners Wisdom and Safety.

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chen chris says:

How are you sir, i want ask you a question, can l replace resettable transformer to a normal transformer, instead burning the transformer l can just reset the switch??? Thank you

mouldyboats says:

First principles.
The whole problem with the ENTIRE hvac industry is service and parts for profit.
Of course you will get shorts,opens,semiconductor fails, bond wire, substrate die junction, when they do single board designs without conformal coatings
whilst no protection from dust, moisture, heat, vibration. I have had to rebuild entire control cabinets of NEW 600 ton chillers from
CARRIER because of this BS. Yes this voids warranty and service guaranties but I will never need them. They don't even use real ball, pin or roller bearings in motors in the smaller common garbage.


excellent troubleshoot, you are a pro, much appreciated ✌️

1calledChuckles says:

Thank you for the help you've given me so far. I determined that I have a low voltage short coming from my AC compressor (read 0.5 ohms instead of 15-20 ohms). Do you have a video for troubleshooting at the compressor that I can watch?

Sam Harper says:

So, what does it mean if the voltage between the red wire and the green wire is 18 volts, but it's 27 volts on all the other wires? That's the problem I'm having, and although I could be wrong, I suspect it has something to do with why my fan doesn't always come on.

LB23fan says:

Y keeps blowing the fuse even with new cables. What should i do?

twentysixmiles says:

Where'd you get that magnet for the door switch? Approximate O.D. diameter please. Thx much!

pa pa smith says:

You talk fast

Rana Keen says:

What setting is your multimeter turned to?????

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