How to Troubleshoot Transformer Failure & Diagnose Bad Contactor on Central AC System

Central Air Conditioning A/C System is DEAD! Only the thermostat goes CLICK when you turn it on! How to Troubleshoot and Diagnose a bad contactor which burnt out the primary/secondary 24 volt transformer. Step by Step.
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[@scottvolage1752]

Testing not guessing. Another fine job Mike. Make the trades great again.

[@Theoldchum]

Shunt, not stunt!

[@Theoldchum]

@@PipeDoctor No charge, LOL

[@videoforgeeks]

I think "radio" killed the transformer side...radio killed the transformer side...lol

[@videoforgeeks]

@@PipeDoctor kzbin.info/www/bejne/jWnVXqeOh7GUsNU

[@videoforgeeks]

The "first" video ever played on MTV back in the day...I thought of it when you said what killed the transformer....Have a good one! 🙂

[@eddiew.6485]

The true meaning of “Diagnosis and Repair”!

[@louisviciedo]

I just moved into a new home and want to instal an ecobee. I went to the transformer and only have 1 segmenet of 24v through the RED secondary, the GREEN secondary is grounded and doesnt have constant 24v. The GREEN wire is connected to my BLUE C wire. the result is that Im not getting constant power to my thermostat C wire. Is this a wiring problem?

[@tckr4883]

If that low voltage terminal block was dangling I’d say that was the issue….ten seconds later I was wrong. Nice job. Did a nice Bosch yesterday…BOVA-60…when you coming to Florida? I make my maintenance tech watch your videos for homework.

[@Samlol23_drrich]

Good job. Fyi, a Shunt goes across without interruption. A stunt is what Evil Kinevil used to do. Not being a dick. I would want someone to tell me

[@christopherchance4860]

Bud Lights VP of marketing killed the transformer

[@pitt1108]

When did wago fix the fatal fault in their design. (Contact only on 2 points of wire)

[@ijmj87beasmodemartin24]

Thank you sr you save me $ time. I'm a home owner in New jersey here everything cost so much this guy came to my house saying yes to fix your problem we taking about 1,200$ I was like nope thank you 7/2/24

[@caflatt7436]

I take it that the system had no fuse to protect transformer why not add one. Professional touch. For next guy, maybe you

[@javajetson257]

Ok. This dude is cool.

[@eastcoast186]

WTF does:) this mean in English

[@EugeneAtViaTyping]

Nice episode, thank you!

[@PipeDoctor]

Thank you too!

[@dburks1273]

Bad contactor or shorted low voltage wire

[@billycarr7446]

I am mechanically inclined and love to DIY everything. That said I am not HVAC savvy, til a few days ago when I turned on the AC for the 1st time of the seasom when it smoked something within a minute. Much research and a parts cannon later I have a much better grasp of a low voltage circuit. appx $200 in parts from Amazon later I am sitting in a cool dry house and I did it! These vids are awesome for us neophytes. My ex wife just spent $800 with a service tech getting hers back up. :-) Yeah, I know, I still have some anger issues. I won by $600. The problem ended up being son #1 was weed eating around the house a few days prior. He snagged a skinny lil wire at the condenser unit and it looked OK. 3 feet back under the wood box guard the 2 wires were deteriorated and touching each other. I ohmed across these 2 wires up at the contactor coil (wires not connected) and got an open so thought the wires were fine. Always visually inspect everything! Would have saved me the $200 but now I have some spare parts for next time and I got some not quite instant gratification. Service techs gotta make a living too but my nature is DIY and spend that money on toys.

[@davidlampe4153]

Nice video thank you but I’m not understanding how it works. I’m not understanding what the sequence is but I’m going to watch it a few times and maybe it will be clear.

[@xlostf8x348]

A 50Va Transformer? I honestly expected a 75Va out of a master plumber. Zone heads baby lol

[@kat2641]

Lol you got to love them cheep disconnect boxes 😂😂😂 I was honestly thinking short in T stat wire or a dead short on the contractor to ground…. Great troubleshooting.!!! I always figured a great troubleshooter was worth more to me than a great installer.

[@zeljkoprezimee4439]

I would put breaker in 24v line to protect transformer if it isnt there..

[@mantorras7752]

Mikey... how do you feel about the Bryant brand?

[@mikehouser5430]

1st

[@flastname560]

How do you like those Wagu connectors

[@tedlahm5740]

Very enjoyable. Very informative.

[@zacharypalczynski8450]

My guy , Mikey fuxkn pipes !!

[@gordonkaufert5013]

Fine job Mike 👍

[@chuckquinn8026]

Love my new Wago butt connectors! What is the advantage of single pole contactor vs double pole?

[@chuckquinn8026]

@@PipeDoctor is there a reason you would want/need that?

[@chuckquinn8026]

@@PipeDoctor thanks Mikey. Just never heard it explained before

[@Knoxxy91]

Awesome video!

[@scottmaz4063]

Good repair

[@danielrandolph9170]

Cool ! 👍

[@cobrajoe2001]

Thank you so much the info

[@PipeDoctor]

You are so welcome!