Intermittent No A/C? (98 Chevy K2500)

[@sweetwilliam49]

You’re up early! Building happy customer base, one customer at a time!

[@MTLeopold]

Phew that was close, your inner mechanic really wanted to turn a wrench just to change something. Nice save Ivan. Thanks for posting the video.

[@vinces8974]

That was another great one Ivan, never underestimate the power of the wiggle and jiggle test

[@markstevens1729]

Yeah… I never pass that one either. Too powerful.

[@rcook1276]

Glad to see you're rolling the repair into the diagnostic cost if it was all done in less than an hour. Great find.

[@craiggoodwin9704]

Ivan, great fix. Nice to know exactly what the problem really is. "No parts required, just some tender loving care!" Thanks for Sharing!

[@tinkerwest]

Another great catch and NPR fix. I bet you've gotten a courtesy call or two from auto parts store(s) saying they've missed you asking if everything is OK...🙂 It's always a good idea to inspect "motor mounts" whenever these types of wiring/connector issues appear to see if they may have caused the problem, the same thing with certain exhaust system problems. Quite often, the engine rocking from damaged mounts can cause these issues.

[@aldrinalmario1513]

Another great diagnosis Ivan, just looking at the gauges you could already see that the standing system pressure is up to spec therefore no refrigerant leak. The next thing I usually do without the scanner help is to jump the low side pressure switch and see if the clutch kicks in, then work from there.. Agree that it's fair enough to charge a diagnostic fee and bundle in the repair work since it was pretty easy and straight forward as loose connector pins. Cheers!

[@OtisPlunk]

Nice Work. Love the NPR 'vidjayos'.The sharp end of the 90-degree pick has a strong attraction to the thumb of my support hand for some reason. Glad you got it done without incident.

[@Topper-gf8xl]

Best GM a/c diagnosis on YT. Thanks for posting, you explained it thoroughly and fixed it without throwing parts at it. Well done.

[@sambitar8448]

Ivan, you are born to be a articulate genius diagnostic tech. thanks

[@stealthg35infiniti94]

Great find Ivan! In my electronic career, I have found nearly 90% of malfunctions are mechanically related. Most problems were corrosion, loose contacts, broken wires, broken or cold solder joints, or carbon on relay contacts. Majority of my repairs require little to No Parts Required. Unfortunately in the Automotive world, too many shops like to fire the Parts Cannon to increase profit. There's no money in just Cleaning a problem, but there's money in Replacing the problem.

[@keltecshooter]

Ha ! Back in the day the old r12 switches had an low point adjustment , lots of frozen evaporator cores when some wise guy would ajust it too low ! Nice video as always

[@lisabrunet8242]

A huge thank you from this non-car savvy old lady. This fixed the A/C on my 1998 Chevy Suburban.2500.

[@PineHollowAutoDiagnostics]

Glad to hear that Lisa!

[@zx8401ztv]

Super quick and easy job ivan :-D I did that drag test on my mates vw golf injector connectors. The correct pin i used for testing just fell out of the connector. After a tweak of everyone, every pin was super tight. Perfect again :-D

[@rcf8367]

Another great NPR fix! Thought it was going to be the common failure of that CCOT switch itself

[@PineHollowAutoDiagnostics]

I've seen a lot of terminal fretting and bad solder joints this summer for some reason lol

[@bombardier3qtrlbpsi]

@@PineHollowAutoDiagnostics probably because there is a thing called... No pride in my work anymore! Your work ethic are few and far between that think like you. 👍

[@kastooMcFry]

Always love the "no parts required" fixes you do, Ivan. I mentioned this before but you need a Tshirt with that logo on in. Like SD "Don't be a parts changer", yours should be "No parts required!".

[@AP9311]

Ivan, very common problem that fails on gm. I replace the switch and everything is good and happy lol. But I'm half way into the video 6:58 so far. I'll keep watching!.

[@htownblue11]

NO PARTS master in action. Many would have replaced the sensor needlessly and it may have worked making a better contact. However, you checking the resistance to verify function of sensor was nicely done.

[@wyattoneable]

That was a great example of a repair done correctly. I had the same thing happen to me and a new connector solved the issue. I sold my 98 flatbed that was in a few of my videos and a week later the new owner said it was stolen. So sad.

[@PineHollowAutoDiagnostics]

Who steals a flatbed?? Shouldn't be too hard to find!

[@howardiko7156]

Don't forget the Deoxit. Great job Ivan as always.

[@markmckinley5989]

Surprised the original hoses are still installed. Usually start to seep with age.

[@tejastechman9212]

Seems to me that’s the first time that truck has gotten AC service since new because it still has the OEM Accumulator. The new aftermarket accumulators don’t have decal on top that identifies the type of refrigerant and weight capacity required. Good job Ivan. 🙏👍

[@deerhunter8533]

Not really. Most of the time they don’t change the accumulator.

[@pantherplatform]

It's still warm enough here in northern Wisconsin to use air conditioning. Every mechanic should know how to use the gauges and charge a system. Easy money. Good show.

[@aleskyfinis1025]

Yes the switch is self is internally messed up

[@Hybriddiag]

Nice work bro..thats what customers want honest work less expense👍

[@thomasdemarco617]

great follow thru, intermittent is the key word here most often inferring to connection....... one hour not enough labor

[@FunnyMuffler]

Perfect video! My K1500 is having A/C issues I haven't dived into yet. Looks like I know where I'll be starting now.

[@lylecheckeye6300]

You should drive up to see Eric O and spend a week on some Diag ! I miss the two of you together !! Great Job !!!!!!!!!!!!!!!!!!!!!!!!!!

[@bergtechautomotive8886]

It would have sooo easy to pad that customer's invoice. So many shops do. I, for one, do not and am glad there are still some good techs that have ethics such as yourself. I've always been in the belief that I wanted to create lifelong customers (and have); NOT right-now customers. Trust is the most valuable commodity in this business (and in life frankly). Once it's gone, it won't return. Keep on keepin' on and much gratitude for sharing your journeys with us.

[@PineHollowAutoDiagnostics]

Great comment, 100% agree!

[@GreyRockOne]

Perfect! Nice Work! Especially when it's that easy! Beats a new switch along with a evacuation and recharge.

[@Mr2004MCSS]

Nice video. I recently replaced that switch on my 98 Chevy K1500 when my AC quit. I had a full charge and have replaced that switch on two other trucks of that vintage in the past so I went there first. I didn't try the wiggle test of the connector but probably should have. A new switch fixed the problem and the AC has not quit since. Those switches don't cost much when you do have to replace them. She will be back in the future for a new compressor because that one is definitely leaking because you can see the oil and green dye. I own two of these trucks and experienced the same thing on them and eventually had to replace the compressors on both. It's a common issue with that type of compressor after awhile.

[@dieselchevette]

Great video Ivan! You were dealing with the GM CCOT (clutch cycling orifice tube) a/c system. That low pressure switch does the bulk of the work of the system, cycling to keep the low side pressure where it should be going down the road. Crude capacity control vs variable displacement compressors, but GM used it for years and years. Older cars had the whole clutch coil current switched by it and the high pressure cutout. This truck and my 97 that had the same problem and npr fix use the pcm to control a relay, a much better system with less wear on the cycling switch. Excellent job learning the system on the fly like that.

[@adotintheshark4848]

Nothing better than a quiet parts cannon!

[@graymodeler]

On earlier Cameron’s 1984 ish, there is an adjustment screw under the plug. I remember the compressor will cut off when low side gets to 25. You can remove the plug and jumper it then set the screw with it running.

[@dieselchevette]

Yeap, the old larger two male prong switch (non sealed) had an adjustment screw. It's worth adjusting when swapping from 12 to 134a to drop it a few psi.

[@mikeaho4143]

Woohoo NPR !! Thanks for sharing Ivan

[@mag1vl]

Hello Ivan from the Aussie guy :) Nicely done mate and happy customer too..

[@jkbrown5496]

Interesting use of saturation pressure of the evaporator to cycle the compressor and control the evap temperature.

[@arciefan]

Nice diagnostic work Ivan. Charge should be 1 hour plus service call and I would gladly pay that if it were me. Nice video!

[@craiggoodwin9704]

In my mind's eye I can just see that truck being driven for an hour, then stopped, then the thermal dynamic forces take over expanding that connector and opening up the circuit! We complain about getting connectors apart but this is what can happen over a period of 23 years or so. I have a 97 Dodge that needs some air conditioning help as well. Maybe I'll get to it this fall now that you've provided some insights. Thanks for Sharing!

[@dans_Learning_Curve]

Found 3 minor and one Major leak on my '00 Grand Cherokee. I went to the point of pulling the dash replacing the evaporator.

[@robbflynn4325]

Good honest mechanic who knows his stuff. My son has a 2003 Accord. He bought it in February and AC never worked. Took it to HVAC guy, he confirmed power going to compressor so said it needs a new clutch/compressor. Wondering now if I should do some other diagnostics?

[@PineHollowAutoDiagnostics]

Easy check, just manually energize the compressor from the relay and see if the clutch engages!

[@robbflynn4325]

@@PineHollowAutoDiagnostics Thanks, you would think the HVAC guy would have done this already but you cannot assume anything these days. I'll try that but I guess no rush with summer now over, although it is still warm here in Bedford County!

[@mikechiodetti4482]

That low pressure switch was a common problem on the R12 and the R134A systems.

[@pb3033]

It's your customer..I'm with you for the diag and maybe, maybe a few bucks for your different 'sprays'..It's up to you 👍

[@weshawkins7165]

Another great video Ivan. I wonder how many techs would have thrown a low pressure switch at it.

[@jamesbruno5896]

Easy one Ivan nice job!

[@somerandomguy3868]

Had a 92 1/2 ton, contact issue at the ribbon connector in the dash, pretty good system all in all

[@joehomanick]

Great job Ivan !! I think 🤔 I would have changed the switch also and fixed the plug for good measure . . The switch is cheap . . I have replaced a crap ton of them . However I always love a no parts required repair from Ivan !!!💯💯

[@PineHollowAutoDiagnostics]

But requires discharging and recharging the system lol

[@dans_Learning_Curve]

@@PineHollowAutoDiagnostics I believe there's a shredder valve under the high and low pressure switches. Should be able to remove and replace.

[@Micko350]

@@dans_Learning_Curve 'Shrader Valve'

[@Mr2004MCSS]

@@PineHollowAutoDiagnostics There is a shrader valve inside the nipple that you screw the switch on to. No discharging and recharging required.

[@georgescott6967]

@@Micko350 interesting. I think that we spell it "Schrader" where I live.

[@oldbiker9739]

my 1991 GMC short box did that last summer , those trucks are amazingly cheap to keep on the road LIKE A ROCK they were and still are . my truck still has R 12

[@markturner7459]

Ivan, you're a good guy!

[@jonmatney9584]

If I owned a shop I'd hire you in a heartbeat and pay you what you wanted

[@madnadn]

“Boom” for a second I thought it’s Leon from bodgit and leggit garage😁 but then I saw your signature “ no parts required “

[@billziegmond4943]

Another great NPR video.

[@baxrok2.]

Awesome NPR. Thanks Ivan!

[@kevin9c1]

I don't find the A/C controls overly complicated, even for the time. I mean, the PCM is in the loop to shut the compressor off at WOT, as well as probably shut it off if engine temp exceeds a threshold. It may have even more logic than that. To me it's kind of like electronic spark control vs a mechanical/vacuum dist. It's not really more complicated (it is in an electronic sense I guess) - it's just better.

[@lustfulvengance]

Yeah to me a complicated AC system would be one with a variable displacement compressor or a hybrid electric and mechanical compressor like Honda used for a while!

[@CARRJ142]

Another great video.

[@CALVINLNIKONT]

Nice job, again!

[@Garth2011]

Rare issue ! I figured it was going to be the pressure switch or the controller inside. DeoxIt to the rescue again ! Maybe ask her if she wants her fuel gauge fixed while its there ! BTW, an A/C shop in my town buys those low pressure cycling switches that are adjustable so they can tweak the cycle for better temps. Many vehicles put about 40 degree air out the vents and thats just about cold enough however, if you can get 36 to 38 air out of the vents, it very noticable and much better.

[@robguysgarage5422]

Gotta love the NPR's

[@roxanneabbott8424]

No parts required love it!!!

[@throttlebottle5906]

the low side port love to leak on that style setup/vintage. **those switches can fail after a zillion cycles, the pins get schmutz in them also. the failure rate isn't as bad as older vehicles that had clutch current directly switched though.

[@dans_Learning_Curve]

*NPR!* I tease SMA that "Ivan would have done a NPR"! Next is the gas gauge? Had the same failure on my '00 Jeep Grand Cherokee on both the small plug on the alternator and HVAC blower. Both were intermittent. Both *NPR*. Previous owner had replaced the alternator.

[@alexanderstefanxandraswedi5835]

Great job

[@JimmyMakingitwork]

Cycling switch/connector? On to the video. :)

[@bombardier3qtrlbpsi]

Nice job 👍. Channel new name. No Parts Required Auto Diagnostics😁.

[@kennethbode2017]

that low pressure switch is the first thing to check if it has freon in system. Known to fail

[@PauloHeaven]

Another no parts required fix 😂 Congrats. That's saying paying attention to the connector's shape can make you go a long way already

[@thomasdemarco617]

those switches are adjustable a small screw inside for custom ac setups or change cycling timing, I feel these switches fail because of dirt or metal in the fixed orifice tube

[@PinBall3]

I Blame These Pennsylvania Pothole Ridden Roads They Sure Do Loosen Up Terminal Connections haha A Very Thorough Diagnostic And Solution Without Parts = A +

[@NoWr2Run]

I BLAME THEM FOR ALL THE RUST ALSO.

[@thebaldmechanichardatheari1124]

Luckily it wasn’t me doing it because in the day those switches would always go bad. Good find

[@yomomma9070]

Cycling occurs during low load-temp has been pulled down and blower speed had been lowered.

[@oscarperla4485]

Hello Ivan great diagnosis What scanner you where using for this Chevy AC diag

[@PineHollowAutoDiagnostics]

Hi Oscar! ThinkTool Pros, added link to description :)

[@charlesmiller7861]

Im guessing you just had some soup, that was a kinda wet belch. Love the NPR.

[@PineHollowAutoDiagnostics]

xD

[@shanestrains2849]

I had a weird issue with this circuit design a while back, compressor locked up, blew the fuse yadayda. New compressor installed with new HPC switch in the back, new switch was shorted internally blowing the fuse when attempting to recharge 😁 Was pulling my hair out

[@rafaelmarin1963]

Pure genius

[@otiliohernandez8349]

What kit did you use for drag test on the female terminal connector

[@fire7765]

Good job

[@markrup6369]

I NEED MY BONUS FOOTAGE!!!!

[@williamwhite9767]

When the AC is not running the static pressure doesn't mean a whole lot because some of the refrigerant is liquid when fully charged. The static pressure will stay the same based on ambient temperature or underhood temperature until all of the liquid refrigerant is gone and if it loses more refrigerant the static pressure will go down.

[@PineHollowAutoDiagnostics]

Correct. But should be enough to close the low pressure switch regardless :)

[@larrystephens7437]

Another great NPR! Sure hope you put in a little fuel before you delivered it back to her.

[@PineHollowAutoDiagnostics]

I don't have a gas station at my shop lol

[@larrystephens7437]

@@PineHollowAutoDiagnostics Based on that gauge I think I would have put the lawn mower fuel in it before I drove very far.

[@agostinodibella9939]

What, no green crusties?

[@yomomma9070]

Pretty sure compressor is leaking or has been leaking in past. It appears very oily/dirty and covered in green dye. Someone probably shot stop leak in it. These compressors are notorious for leaks where the body of compressor are assembled. Sometimes stop leak would work, though I do not recommend nor use myself. That pressure switch is a common failure as well the repeated on/off from cycling wears them out. Sometimes you can tap on them to make them up.

[@chriss32]

Boom!

[@nv1493]

Thank you for not packing the terminals with (non conductive) dielectric grease. it has its place but like anti seize, if a little works then a ton of it must be great....😑

[@stevencox75]

how do i find a good mechanic near me, what should i look for

[@dans_Learning_Curve]

Word of mouth.

[@mikefoehr235]

Nothing worse than having a politician car...all it blows out is hot air. Good repair. I was cheering for NPR.

[@Chris-kq7ko]

There’s your problem lady! Oops wrong channel.

[@pookatim]

cool

[@davidgrisco1939]

Prior to proper diag, I would have guessed clutch worn just due to age of vehicle.

[@Micko350]

5:25 'but what causes the cycling action?' A Thermostat, located on the Evaporator on most vehicles, unsure if that was a Delphi. GM utileses variable displacement Compressors, which fail regularly over here!

[@AJ-wj9ij]

Faulty lp switch , high pressure will cut the system When temp is met

[@AJ-wj9ij]

LP should be always closed unit three are no pressure

[@hooptierescue2540]

The auto repair mafia's gonna be coming after ya for makin' them all look bad!

[@fleurys2]

you're not a real mecanic!... a real one would have charged the switch, the compressor and a refill...... just kidding... love your videos and your trouhbleshooting skills... keep them coming.. cheers !

[@NoWr2Run]

I hate it when the hole's to BIG.

[@inothome]

Thank you for calling it refrigerant and not Freon!! (pet peeve of mine) Even though it has the cycling switch, isn't that a variable displacement compressor? Meaning it's not a cycling type system and uses the variable displacement to maintain proper pressures? Honestly not too familiar with GM compressors and just assuming.....

[@inothome]

Now if we can only get everyone to say positive and negative when referencing DC power instead of plus and minus the world would be perfect! It's the little things in life..... ;-)

[@ludvigericson6930]

But plus and minus are not actually incorrect, just layman’s terms. Freon is factually incorrect.

[@Mr2004MCSS]

No, that system and compressor cycles during normal operation. I've owned one of these trucks since new.

[@inothome]

@@Mr2004MCSS Just because it cycles doesn't mean it's a cycling type system. There are limits with a variable displacement compressor and they will still cycle, but not as much. Whereas a true cycling type will depend on the low pressure switch to cycle to maintain a better pressure with varying RPM of the compressor. I couldn't see enough of the compressor to know what type it is. But, doesn't really matter anyway.

[@rtta51]

Don't get caught driving around with pot on the front seat.

[@NoWr2Run]

YES & THAT'S A LOT OF POT, LMAO.

[@jackwood8307]

🎃

[@trezsr]

So I see that you only take on NPR jobs.

[@PineHollowAutoDiagnostics]

At least half of diagnostic jobs are NPR lol

[@coolioi407]

Early diags lol

[@jonclark1288]

Ivan, you're doing it wrong! Everyone knows that as soon as the A/C stops blowing cold, you're supposed to buy a can of A/C Pro and dump the whole can in first! Then you go on internet forums and ask everyone why that didn't fix it!

[@PineHollowAutoDiagnostics]

haha have seen that method before!

[@yomomma9070]

Man have I seen my share of overcharged systems! Some people think if you put more freon in it will blow colder. They just don't understand under or over it ain't cooling. And over is worse for the cause.

[@zombietherapy1759]

Could of/should of been a doctor? Just prolonging the inevitable. Old cars and old people. What a mess!

[@bruceirvine3962]

Twerk it! Ha.

[@nsaglian]

A Russian fix again! И снова русское исправление!😁😁