I Wonder How Many Auto Repair Shops Would Have Misdiagnosed This Crazy A/C Problem...

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In this video we show you how tricky A/C diagnosis can be.
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7 июл 2021

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Комментарии : 441

@billrok 3 года назад

Now you know why people drive 500 miles to drop off their car to him.

@Twobarpsi 3 года назад

Yeah!

@kainhall 3 года назад

500 miles is a Sunday drive in NE Montana . its 160 miles to a walmart dude..... and we are the biggest town for 160 miles in all directions (no walmart... even no shopko anymore)

@rds990 3 года назад

I just did exactly that....I live in MN....drove down to IL for service on my F150. GREAT work.

@roninkraut6873 2 года назад

@@kainhall Do you need a neighbor? We got swamped by Californians the last few years and I can’t stand it

@johnboy3100 3 года назад

Need more mechanics like this guy for sure....

@ouch1011 3 года назад

Unfortunately mechanics are severely under paid, so people who have the talent and brains to do the job well either don’t start in the first place or leave to more lucrative industries. Electricians, plumbers, hvac techs all make more money (sometimes substantially more) for a job that requires less knowledge.

@Seveneleven44 3 года назад

@@ouch1011 you are 100% correct. I’m a diesel mechanic at an independent shop and to be frank, I look at guys who work at big time places as glorified parts swappers. I’m not an expert, every single day is a learning opportunity. Could I leave my job and go work in an industrial park and be a “maintenance mechanic?” Yes. In fact I could probably leave my job in the morning and have a new job and sign on bonus by the end of the day, but my quality of life would not be the same. Money is nice, but quality of life and the feeling of accomplishment when a job is done is more important to me, as opposed to making $30+ an hour at some slapdick job where you do the same thing every day.

@zachshipley1689 3 года назад

Where he did older engines as well, he help me learn the 5.4 3v through and through. I could use some pointers on my 84 300

@3613jeremy 3 года назад

Unfortunately most shops have 1 maybe 2 certified mechanics and the rest are parts changers

@lesterbrown1432 3 года назад

There are mechanics and technicians. This guy is a technician.

@jeffreykreft5442 3 года назад

No wonder it blew the seal on the compressor. Great diagnostics, good information to keep in mind while working on these.

@mattmccauley8155 3 года назад

The shaft seals on these don't leak , the FS 10 and FX15 did . This was an internal failure . If these compressors leak the housing leaks .

@lovernotafighter1074 Год назад

@@mattmccauley8155 what would cause it just to put out more water out the pipe nothing else different?

@chuckychuck 3 года назад

I would never question your diagnosis, I had some major issues with my heating system, I follow your instruction right to the core, switching out my timing chain, housing gasket water pump and flushing out the radiator while the engine idling now the heat come through the vent reading 150 in the winter, once paid a radiator shop 500 dollars to clean my radiator an change out my heater core but still had the same issue within the heating system, this is why I work on my own vehicle now, mechanic these days don't want to diagnosis anything anymore, everything is new parts which doesn't solve the issue you brought your vehicle in for. Been a year now, didn't have one issue from your teaching on how to do. Which I lived in your area definitely would bring my vehicle to you, don't mind spending the money if you leave the shop with your issue solved with your vehicle, thank you, I love your channel.

@fredsalter1915 3 года назад

I agree with you. This guy's channel is full of priceless information. And it's all free, God bless him!

@jimyep9971 2 года назад

Thats why alot of DIYers are out there. just saying.

@calimesacox 3 года назад

This is why I tell all the techs that work for me show me PIDS. You can NOT diagnose anything without data that any module sees.... Data.... tells the story. Great find

@sharpridgehomestead 3 года назад

reminds me of many years ago when I worked at a ford dealership I had an exact same situation, ac compressor was replaced at another shop, low pressure side seemed about normal, high pressure side was very low when running and when not running both were equalized. The other shop basically recharged the AC system based off of those low values, it was technically way overcharged by the time I got it. What I ended up finding out was the root problem was that the compressor had come apart, hence why the other shop had replaced it, but the condenser was full of metal shavings clogging it up (which imho, was really a good thing because otherwise all that metal would have gotten back into the new compressor eventually).

@ouch1011 3 года назад

Unfortunately most mechanics, including those “diagnosing” AC systems have no real idea how they work. For me, it’s easy to see at a quick glance that there is a restriction in the system between the compressor and the high side service port because that is the only reason that the high side pressure on the gauge would drop after the compressor came on. Diagnosis would be quick after that by using a thermal camera, infrared thermometer or even just your hands to see where the system gets cold where it shouldn’t. Done it dozens of times in the past. But you’re right unfortunately, the vast majority of the mechanics working on that would get it wrong.

@garyr7027 3 года назад

They stuck a new pump on a bad condenser, not a very wise move for a new pump. I'm betting that old pump was completely shot, plugged up the condenser... and those type can't be flushed.

@overload3996 3 года назад

Infrared camera works great on cooling systems also , heater core inlet and outlets,etc.

@rickmiller1779 3 года назад

Never used infrared temp camera. Temp guns and hand Temps work s to me. Idk, snappy wants to sell me one. Ought to get the shop to buy one. Maybe with this video, I can prove we need it! I spend enough on tools, for last 35 years!

@overload3996 3 года назад

FLIR is the best for pro use. I have FLIR. Even a FLIR ONE to your cell phone is a big gain.

@JimmyMakingitwork 3 года назад

This should be basic Air Conditioning 101. The condenser outlet will be cold, since there is likely a restriction in the condenser. Anytime the pressures are odd like this, use a temp gun to find the restriction. It’s also a good idea with any modern vehicle to get a scan of the data first also. Nice work.

@jerryrounds8586 3 года назад

Extremely interesting short diagnosis videos lately. You are one most talented technicians/experts on RU-vid. Thank you for the information.

@radman999 3 года назад

Was nice in the old days when they had R12 test ports on the compressor as well.

@whirlwind8825 3 года назад

If you own a truck long enough , you are going to go through a compressor or two. When I do I replace, the condenser coil, the filter dryer, the orifice tube valve, and all the o-rings on the connections along with the new compressor.

@tomtheplummer7322 3 года назад

If you want your warranty on the compressor, those are the things that are required.

@justa40somethingyearoldguy 3 года назад

Watching this guy's channel has done two things for me. 1. Saved me tons of money by enabling me to do my own repairs. 2. Made me lose faith in almost every mechanic shop I've talked to because they don't go into anywhere near the detail and diagnosing that he does.

@godemperormeow8591 2 года назад

They probably get rushed to do things all the time where as if the dealerships didn’t have flat rate and allowed the techs to work as a team, they would figure things out real quick.

@waynea2707 3 года назад

The reason why it was misdiagnosed is because the dealerships and repair shops just want your money they want you in and out. You actually care I wished we had mechanics like you that care and want to solve the problem.

@leoashrae4199 3 года назад

I've found this a few times in the past. In several cases I found the problem wasn't a plugged condenser coil but, it was a plugged "filter screen" at the inlet of the condenser. I think the reason for these screens is to keep the chunks out of the condenser in the case of a catastrophic compressor failure. I suppose it's a good idea but, the problem is people don't clean them out after a compressor failure and they plug up with chunks and scorched lubricant.

@BYENZER 3 года назад

YOU DA MAN TOO! BRILLIANT!

@overload3996 3 года назад

Infrared camera can pin point it. I use it on cooling systems also.

@meyersmichael975 3 года назад

@@overload3996 03 Explorer I just changed the two actuators in the rear and the expansion valve the the front ac is fine but in the rear, the refrigerant is not going past the expansion valve I just changed the ac is getting their but not going past it what is weird to me is that the expansion valve has an arrow pointing upward but the refrigerant seems like it’s not going down past the valve idk why it has the arrow pointing up not unless it was I didn’t put it right

@Walczyk 2 года назад

yeah the orifice tube

@dennismcintosh3699 3 года назад

Unless it's crazy expensive I like replacing the condenser every time I replace a compressor. A mechanic I used to work for before I had my own shop said this restriction can be the root cause of why the compressor seals blow out. A condenser is usually only $100-200 anyway. cheap insurance.

@bigrickd1957 3 года назад

Most compressor manufacturers require that a condenser be replaced to keep warranty valid. Parallel flow condensers cannot be flushed, they have to be replaced.

@himni1 3 года назад

@@bigrickd1957 exactly. Even if they didn’t require it you should replace it since it can easily cause more problems.

@mattrandleas3575 3 года назад

I believe the receiver dryer is part of the condenser on this vehicle and should’ve been changed out when the compressor was replaced

@prevost8686 3 года назад

Unless a compressor blew in a million pieces you never saw issues with condensers until about 2003-up.

@tiredoldmechanic1791 3 года назад

One of the rare times the manufacturer tries to make something easier to work on that actually makes it more difficult. As soon as the high side pressure drops lower than it was at rest, a restriction should be suspected. In the old days of the York compressors in Fords, it was very common for debris to block the condenser when a compressor failed. It was common practice to back flush the condenser and lines when a compressor was replaced.

@roberts5118 3 года назад

These new compressors still block the condenser with debris when they fail. Nothing's changed lol so whenever a compressor fails always anticipate the debris blocking the condenser and replace it as well.

@joeydeemendoza 3 года назад

Excellent diagnosis ! Love your work and thank you for always being thorough in your explanations.

@21Piloteer 3 года назад

That's a 2010? Wow...looks newer than that. Good looking SUV.

@dr7477 3 года назад

Thanks! My Navigator is also a 2010. We love it. It has 187k and just took us 5k miles across the country and back pulling a 7k lb camper.

@heyitschinoable 3 года назад

Excellent video! I had a problem just like this on an Altima a few years back. Condenser had a restriction. My service port was on the liquid line as well on that car. The high side pressure on the liquid line was so low it was frosting over from such a low pressure. I will never forget that car it was a cool repair. Service port locations matter!

@drymoonproperties 3 года назад

Never am disappointed watching any vids you take the time to make always learn from guy What a treat to have such an awesome tech taking the time to teach so many of us.

@RRada-kx8ip 3 года назад

Nice fine! One other hint; if you don't have a scan tool to look at the pressure sensor at the inlet to the condenser is to touch ( back of your hand with a fingernail doing the touching part) the discharge line of the compressor. It would be smoking hot to the touch! Hi pressures = Hi temperatures in the A/C world...

@randomgooglename 3 года назад

Well, i guess im hooking up a scanner every time i hook up the gauges from now on. Thanks bud.

@brianrobinson8663 3 года назад

good job on the catch, I made it a habit of mine a while ago to replace the condenser and dryer anytime I have to swap a compressor

@stihlms 3 года назад

I can't wait until you do the 11 through 19 Ford Explorer rear AC lines. That's going to be an interesting video

@miltstone2 3 года назад

I’d like to see this as well since it’s such a common problem

@brucejones2354 3 года назад

I had an interesting problem with a 2000 Freightliner. The screen on the dryer failed and allowed the small discant pellets to escape into the system. All the lines from the dryer to the expansion valves ( two evaporaters, one in the cab, one in the sleeper) were ALMOST completely plugged. A C worked good for about 5 min then not very good at all. Took a while to diagnose, then took a LONG while to repair.

@jamesbruno5896 3 года назад

Classic plugged core! Thanks for sharing Brian!

@zygi22 Месяц назад

This is excellent video. Gives you a great perspective on diagnosis ac issues.

@DavidReyes-fd3qz 2 года назад

Tanks for sharing your knowledge and not being selfish

@LeewardStudios 3 года назад

That’s also why you check temperatures at the top middle and bottom of condenser. If customer states and you confirm only cools effectively she the car is moving, and the fans are on always look for condenser issues. Only way to do it if you don’t have a high level scan tool to check that data.

@michael931 3 года назад

What should the temp readings be if good and what if clogged?

@rickmiller1779 3 года назад

Pressure and Temps are very close together..ex 40psi low side pressure, expext 40-maybe 50 degrees at the pipe(cool or cool to touch) and high side expect similar idea. With over 350psi differences (scan tool to high side service port) could use infrared temp gun, or your hand...just don't be stupid, it's hot side of the a/c system. Service port pipe should feel cool and go back to where it's gets hot, extremely hot!! Pipe and component temperatures are extremely Important in diagnosing temp to pressure issues. Have had many times that pressures look great(40-50 low,150+high), but not cool(pipes or vent) reclaim,.. no refrigerant and perform a/c service and work properly. Obviously has some kind of leak, and dye and time may help find that. Point is pressure and Temps go in tandem. My 2 cents. Great video, as always!

@johnds6621 3 года назад

Nice to see a mechanic using his brain. Now can you move to my state?

@fordltd1983 3 года назад

Very helpful info to keep a watch for. Thanks.

@-Savage- 3 года назад

Great diag and wonderful advice. As a technician myself I've found that if an AC pump requires replacement, there is a good chance that debris is in the system. Replacement of condenser receiver/dryer and orifice tube/ expansion block at minimum gets done.

@homesteadhaven2010 2 года назад

We call this a compressor kit, internal failure of a compressor is a done deal.

@gailtaylor1636 3 года назад

Excellent, excellent, excellent diagnostic process! Sometimes you really wonder what the engineer was thinking.

@eldoradony 3 года назад

Brian, I watched your video this morning. At 4PM a customer showed up with a 2003 PT Cruiser that had the exact readings as your navigator. Unfortunately it didn't have the electronic sensor to look at with the scanner. I am confident that it has the same problem that you demonstrated. Thank you.

@jerryfrederick6610 3 года назад

Your videos are very complete and helpful. Thank you very much.

@yourlocalalexis4578 3 года назад

WOW, those readings would have fooled me....Thank you so much for the tip!!!!

@ozzstars_cars 3 года назад

Excellent diagnosis and explanation. Thanks Fordtechawesomeloco!

@nelsonrodriguez2263 2 года назад

A real mechanic honest true , hard to find ,I miss the good ole days

@The3800Bird 3 года назад

This helps tremendously. Thank you!

@AngeloZ32 Год назад

BRO!! Thanks so much for sharing your knowledge! Your content is worth Gold!

@glenniz1 3 года назад

One smart guy....thanks for all of your help!!!

@Dipperdap1 3 года назад

Another great video. Thanks for your knowledge.

@mkaestn 3 года назад

This guy is great! He is for the people where driving a 1992 Celica is NOT an option.

@DooMHaMMeR247 3 года назад

Invaluable lesson

@felplayvina 3 года назад

excellent diagnostic today i was looking at Hight pressure scan data thank for the video.

@viaswords4888 3 года назад

Great vid You always bring useful info to the table . I'm seeing the compressor come on/off even when the ac button is depressed

@Gatf4 3 года назад

Great Video. Thanks for sharing

@azmechanic2199 3 года назад

Yes! the location of these service ports can throw you off!!! Just had one like this a few months ago, I scratched my head when I saw the low pressures and the cooling fans on MAX! I pulled one of the lines off and the oil looked like liquid metal. Severe metal contamination throughout the system. Had to replace all major a/c components and flush the lines.

@tracewallace23 3 года назад

What an awesome tip👍 Thanks

@jaredkennedy6576 3 года назад

This is a good job to use a thermal camera on as well. The coldness of an ac system is made by changing the phase of the refrigerant from liquid to vapor, and wherever that phase change happens it will get cold. If you scan a condenser and it's not a gradual temperature change from the inlet to outlet sides, then there's a problem. This car was probably bad enough the liquid line would have felt cold/cool.

@beegood9395 3 года назад

Great video from a very knowledgeable technician!

@billthrasher3587 3 года назад

I saw that a couple weeks ago.. Another mechanic sold a compressor because of low pressure on both. After he put the comp on it was the same. i told him to check the pressure on the scanner and it was over 400 psi with the fans running full high. Pressure sensor was right off he comp and high pressure port was after the condenser

@speedy_pit_stop 3 года назад

Makes perfect sense. Thanks for posting.

@belindakt 3 года назад

Excellent diagnosis! Also, check the orfice tube, & the screen @ the condenser inlet if it has one......

@YardpigTSI 3 года назад

Great video's as always. I've scratched my head on that problem before. Thanks.

@Paul1958R 3 года назад

Brian, Great video, diagnosis, and explanation - thank you! Paul (in MA)

@infinity3jif 3 года назад

love these old v8 powered expeditions/navigators

@codyramos3200 3 года назад

Old?? It could be my old age of 30 or the poof of dust that comes out out my wallet but thats damn near new by my standards Lol .

@scroberts9316 3 года назад

Now, that was an awesome diagnosis and explanation - thanks for the video!

@tpiii33 3 года назад

Seems so obvious...I would have definitely taken hours, or days to figure this out. Great vid!

@JK-re5jr 3 года назад

Excellent information. Well done sir. Thank you.

@kevinarmstrong864 3 года назад

Thanks never thought about valve locations relationship to restriction locations and gauge pressure troubleshooting .at least you like working on ford's

@mikecont9742 3 года назад

Great ac diagnosis video...

@jayneville1 2 года назад

You did it proper. I work at an automotive HVAC specific shop. If it's what you do every day, you could have diagnosed it with your hands feeling the temperature of the lines... You did good though. Proper diagnosis.

@donnierobertson3088 3 года назад

Great job and video like always

@routeoneauto 3 года назад

Thank You.

@Real_Tech_Skills 3 года назад

Currently there are 4 thumbs down votes on this video ... Why would there be any thumbs down votes? This is a GREAT video (which is the normal for this channel). Thank you for producing such great content and sharing your knowledge/experience.

@kalecastaneda 3 года назад

Great find!

@tommorrell 2 года назад

This is the type of diagnosis that a thermal imageer is great for. When I see a/c pressure that don't make sense I start putting my hands on the lines. Line temp never lies.

@robertwhite8599 3 года назад

Good find. I’ve heard of the box store refrigerant that contain additives do it but never seen it in person.

@abrahamrojo 3 года назад

Very accurate…!! Two thumbs up

@heyitschinoable 3 года назад

You really have to monitor the gauge readings, live data pid, service port locations, and visualize the ac system mentally until it all makes sense 😃 well done!

@MarioDallaRiva 3 года назад

Right arm, Brian! 💪🏼 You da man, for(d) sure 👏🏻

@bobbyabbott3035 5 месяцев назад

Very good

@WhipCityWrencher 3 года назад

Good diagnosis 👍

@eddiet5977 3 года назад

These videos are super helpful. Keep up the good content. 👍

@Jpilgrim30 3 года назад

Good work. I almost always hook the scan tool up when having ac issues. Sometimes it takes more digging with things like the thermal imager when you have one that has the high pressure sensor on the same side of the condenser as the service port. I wish they’d always put the sensor between the compressor and the condenser to give us more information. See a lot of plugged condensers in Honda’s where the desiccant bag on the side of the condenser comes apart.

@joesantiso6495 2 года назад

Good video - what I learned the hard way was to use genuine Ford parts - got torched big time with aftermarket stuff

@whoscook4481 3 года назад

Thank you once again!

@johnathanrichardson7405 3 года назад

Great Catch!

@mikeadler434 3 года назад

Awesome video!, thanks.

@DependableAutoTruck 3 года назад

wonderful diag very helpful

@jamesparent1525 3 года назад

Good job I always look at the radiator and condenser to see if full of cotton seed then hose it off and then blow it out with air 2 times got to have the air flowing

@halleffect1 3 года назад

Great diag, thanks so much for sharing. I would have called the compressor in this case. i think that's why some AC shops just change everything and bill the customer, easier to do that than find the problem. one more thing, you could probably figure this out with an IR temp gun going down the line. the outlet of the condenser would be way too cold.

@WizzRacing 3 года назад

I use a temp gun on the condenser and lines. To see if it's actually passing through..

@dannypalmer7701 Год назад

Wow! I would have never knew this! 😮

@on-site4094 2 года назад

Engineers have a great time designing it driving the techs crazy years later great diagnosis and repair

@caveman31750 3 года назад

To make matters worse if you follow some factory service manuals for "proper" operating pressures they give you certain ranges of pressures for both high and low side under specific ambient conditions. However they tell you the discharge pressure range but there is no discharge port to read pressure on... so some people add refrigerant to get the LIQUID pressure in the correct range thinking they have done the right thing since technically that is a high side of the system and have overcharged the system. Not a problem if you have an a/c machine for charging by weight... if you charge by weight and your pressures are still off you have a problem! Some of us shade tree guys can do quality work without all the fancy tools. Those fancy tools do make things easier though! Thank you for sharing your knowledge and videos!

@cliffharrington6500 3 года назад

An experienced auto air specialist can diagnose this issue with just a set of gauges, coupled with the experience from feeling the temperature of the discharge line, liquid line, suction line, and approximating superheat at compressor suction port. Also the amount of hot air being expelled by the condenser can immediately reveal its state of performance. A infra red thermometer is also very helpful for diagnosing.

@jessev2197 3 года назад

port position 101. There were some cars (imports) that had ports on both sides for this reason.

@davedeatherage4902 3 года назад

Thank you sir!👍🏼

@Deretox25 3 года назад

Good job. To also add to your diagnosis, the classic “feel” test should’ve been a red flag. You would’ve been able to feel no heat exchange through the condenser by feeling the lines before and aft.

@donmunro144 3 года назад

It would have left me scratching my head. Not sure I could have made a diagnosis. Easy to see in hindsight.

@nickma71 3 года назад

First, put the f-ing scan tool away. If you put a restriction in any flow system, the upstream is high, down stream is low. Ford does it right, and still publishes gauge diagnosis reading. I don’t mean you with the scan tool.

@kd7cwg 3 года назад

I had a 97 grand marquis. Replaced compressor,condenser and accumulator (required for rock auto to warranty compressor). Worked good for awhile , and later on had a restriction. Accumulator was frosting up and high side was 400 psi. Thinking it was the orifice tube on that one. Sold it before I ever found out. I am not sure if In 97 , scan tool data would supply a psi reading from the high pressure switch. Being able to read that data from a scan tool definitely helps.

@don2deliver 3 года назад

Did lots of A/C work for body shops. Liquid line pounding from 2 orifice tubes. Pressure not changing much when A/C turned on from 0 orifice tubes. High side switch fast cycling from lines hooked up backwards. Hood and radiator support capacity stickers missing.

@phillipthethird42 3 года назад

Thanks, this was very helpful. I had a condition similar. I think I'll go back and look at my car a second time.

@Twobarpsi 3 года назад

Best technician anywhere!

@cdars1 3 года назад

thanks alot bro

@spelunkerd 3 года назад

With low pressures on both gauges, I wouldn't be surprised if some would interpret it as a low charge, and mistakenly add more refrigerant. Nice to see data pids come to the rescue.

@joelquintana7587 3 года назад

You are best Amigo

@agustinvillanueva57 3 года назад

Like 👍 your video, you are one off The best auto mechanic out there...Thanks 😊

@isb170swap8 3 года назад

Great diag, but the only problem I could see is if the shader port was directly after the compressor on this case you may think the restriction could be the orfice tube or txv. So having the ability to read in 2 locations makes this easy.