🔥 How to troubleshoot an air conditioner with no power. #electrician #hvac #handyman

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“You set this to Volts AC because it’s an Air Conditioner…”

PlatonicOwl
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SPOILER: He replaced a blown fuse. Double-spoiler: Fuses are almost never the real problem, so this problem is almost certainly not fixed by the time the tech leaves.

For your own safety, DO NOT follow this guy's instructions in this vid. What he did is is absolutely dangerous for a professional, and much much more so for someone with no experience.

1. NEVER crack open the housing and start testing for voltage first thing. He said he checked the t'stat in the house, but it wasn't until several steps later that he checked the breaker. I'll save you the click: it was at 1:03 in the full video. That should have been the very next thing after the t'stat.

2. Test the compressor for a short before blowing a perfectly good fuse and the (customer's) money that paid for it.

3. NEVER push a fuse into an open and exposed panel like that, especially when standing in foliage. You saw the small slip that happened and this guy is supposedly an experienced professional. Imagine the slice you'd get sending your hand into that sharp metal, or worse, if you hand makes contact with the top terminals of the fuse clip. POW. I've seen experienced techs do both just because they go in too much of a hurry.

4. NEVER push the pullout into the disconnect without the shield over the fuses. See item #3.

5. NEVER test a fuse while it's in the socket! It may give a false positive for continuuity due to a short. Plus, testing continuity on a live circuit outside just isn't wise. There are safer and faster ways like measuring the voltage on the bottom clips. If both legs are live and the fuses are good, you'll get 240V on the top and bottom. If you don't get voltage on the bottom, then take the time to turn off the breaker, verify that the circuit in the disconnect is dead, THEN start sticking your hands and metal tools in there.

And lastly, a blown fuse is almost never the real problem. The real problem is what blew the fuse. This job isn't done by replacing that fuse. It's just kicked down the road to what may well be an even more expensive fix on an even hotter day.

Signed - a guy who hasn't been in the HVAC business in 20 years but still knows the basics very well.

OptimiSkeptic
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I love the part where I learned what was wrong... 😅

IAMRYLT
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Always check circuit breaker in the house panels first!

dgrasser
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Im a proud tradesman....But you guys are full of electricity, the music is oh so calming....

stormbustin
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Typically the first thing I check is 240 to the contact then move on to capacitor

anthonys
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Knew nothing about AC and my friend asked me for help over the phone. He explained everything you just showed but only had 120V at the capacitor he just replaced. I said I bet it's the disconnect switch. The tabs were loose. Once he cut off the power squeezed the contacts and boom AC now works.

vonzellable
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Yeah. Check Circuit breaker and then disconnect before you even touch a tool

GhengisFreud
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Something tripped breaker in house. Need to find out why? Shorted compressor, motor, etc...
*note absolutely hate those disconnects. Have had them break many times over the years.

JamesSmith-fisn
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Compressor is probably blowing the fuses. It already has a hard start kit on it.

natew
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Mines was working back then the freon had got ice on it freezed up

TheNyasha
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check the easy stuff first. #1 check the thermostat. #2 check that you have power at the disconnect. If it’s fused check the fuses. If the fuses are good go into the compressor and see what’s going on in there or not going on.

Harrison
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This didn't tell me a damn thing 😮

ronnieredding
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Dude, wouldn't you check the disconnect first that's the easy step could have saved yourself taken apart the panel possibly. Probably not but maybe and because it's easiest I would start there.

paulvild
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I have an old R 22 air conditioning heating system. Gas forced air unit looks like it needs replacing. What brand do you recommend replacing it with?

larryhack
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The fuse in the disconnect was blown this is why there's no power there the reason it was blown is because the compressor windings are probably fried the compressor was most definitely on its way out due to the fact it has a hard start capacitor in place a hard start capacitor is meant to buy you sometime and is not in any means a repair

shagdog
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thumbs up for choosing Satie for your background music.

blipblip
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Those are my least favorite disconnects.

chrismiles
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It has low voltage that is why the contactor is still pulling in. The inside still has voltage. I could have told you that there is a loss of high voltage to the outdoor unit. Most likely the breaker. Now you have to find out the why. Do not attempt this if you do not know what you are doing.

darksiderydah
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In India, Fan is mounted vertical, here in video it shows Horizontal facing sky.. doesn't rain or snow affect such design

nishiter
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