York Package unit not cooling 

Also keep a lookout for return dampers closed on some fire systems. Sometimes the whole roof is wired to one dry contact at the fire panel, locking everything out for 1 fault somewhere.

Soon as you said many units down, I thought fire alarm. Good video

Good one! 👍 I really like your thorough & calm procedures 👌

Great video---Im a new subscriber---I appreciate when someone is man enough to admit he overlooked something or didnt see the issue immediately--thats how we always learn for next time

Well , I learned something today , just by watching you go through the trouble whilst sitting on my arse ! Cheers for that 👍😅

Really good analysis, and patience on your end, solid troubleshooting thanks for taking me through the process 2 thumbs up

Hello sir big fan here from Minnesota, , just started watching your channel a few weeks ago, thanks for all that useful information. I like the way you explain things and explain what each wire does and what every control board does and all that stuff, you go deep in to the important stuff, I also like that you go straight to the point and also never make a video extra long by telling us about your personal life and bla bla bla lol anyway thanks for helping a lot of us become better at this trade I look forward to watch more of your videos and learn more. Thanks and have a great day!

Solid troubleshooting. Nice walk through.

great video, like the way you keep your cool while trouble shooting & explain your thoughts as you move along. Good job👍

Awesome catch. Love watching the videos and keep them coming. Thank you

Definitely learning a ton Thanks so much😊😊

If you're anything like me, I seem to ONLY learn and remember through struggle, pain, etc. :-) Great job, and thank you for the video.

Great vid brother.. awesome channel im happy Chris at HVACR VIDEOS threw your channel plug in his live stream on Monday. I can’t believe you never came up in my algorithm before that! Good stuff!!!

Great video Curious h v a c we had to wire up a three phase motor starter with overload and three phase monitor protector in the lab it was a good learning experience. Awesome content love the channel thanks for all your knowledge.

Thanks for this. I have a ton of York’s for my McDonald’s I take care of this helps out a lot having a similar issue

Good job bro thanks for the walkthrough

Good job dude where to go Mr. troubleshooter sir my salute sir

AWESOME SHIT! thanks

Good catch!

Let bonded filter company know they need to fix there pleat insert filters. Good video

Nice job, I have this same problem and as soon as i started to look into the smoke detector it started raining so I didn’t get to finish. I thought i was crazy too because the board had power but wasn’t flashing any lights.

Your a bad arse. Well done!

Thanks boss

Thanks for sharing 👍

damn good content brotha!

Nice job

Good job

Good find

great job

This cabling is a mayhem. The americans do not have any honor when it comes to cabling. This is a terrible way...

nice video. I say that same thing when that happens to me. no instant gratification. because it still feels like a guess. lol

A way to check a short is pull all wires off beside incoming power and plug wires in one by one until it short/board shuts off

Those damn smoke detectors!

Sounds like some old Bristol’s but still a lot better then the LG shit we put in today.

10:45 nice find plus Air filter is like useless it's the cheap It Looks Like paper crap that doesn't flow good enough

Excellent Trouble shooting.9/15/2021

Hi, my york rtu unit is in heat mode and giving a HS1 limit switch error on the smart simplicity control. I've checked the high limit switch and it seems fine. The manual for the control says the LS1 has tripped 3 times within an hour. This results in the HS1 LIMIT SWITCH LOCKOUT. Any help would be greatly appreciated. Thanks.

Was it the same issue in the second unit as well?

Super

They should have been getting a trouble alarm on the fire system inside the building .. next time your control circuit is doing weird stuff I bet the smoke detector will be the first thing you look at - corset all u have to do is check for that 24 volt input from the smoke detector...

Vinstar monitored!

When one leg of three phase power goes directly to compressor, this is a trickle circuit to warm compressor windings CCH

Just FYI smoke alarms have a tamper switch on them ,the cover has to be on to work correctly ,and reset

Those blue filters in front of the evaporator coil look woefully inadequate. They look like glorified coffee filters. Nothing like I've ever seen before, but I'm a design engineer, not a field tech. What do you think?

👍

The 2 flash is start up delay. If you hold test button for 3 sec it will bypass the delay

Look at the back Of the board damn, it’s so easy

You have

Bit of an overly complicated phase monitor.