How To Make your AC Blow COLDER & HARDER 88-98 Chevy GMC -Jonny DIY

Make your AC Blow Colder, Harder, More Powerful & Quieter! In your Chevrolet or GMC, Silverado, Sierra, Suburban, Tahoe, Yukon, Truck or SUV. Easy Project! Do it Yourself & Save!
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[@JonnyDIY]

*Tools & Supplies Used* A/C Refrigerant R134a & Hose with Gauge Kit- amzn.to/3UKKbyv Mechanics Tool Set- amzn.to/3tbmEbo Replacement Blower Motor- amzn.to/2Mzcr8l Safety Glasses- amzn.to/2XXe3dI Nitrile Disposable Gloves- amzn.to/3V4y6Wg Mechanics Gloves- amzn.to/2w0i1SP *Thanks for Watching! Help Support the Channel by Subscribing & Clicking the BELL Icon for all NEW Videos!*

[@HorsepowerHouse]

For others viewing this : After you remove the debris, it is a good idea to spray a cleaner like the simple green or purple power, or any kind of dirt remover, and just spray the evaporator down, as well as the entire ventilation chamber. and then rinse it with water, all of that liquid will drain out of the drip tube out through the firewall. This helps even more. I had to do this on my 1990 K 1500, and it helped tremendously. And be careful spraying water in there that you don't spray too hard, cause it could damage the fans which are basically just like a radiator or heater core type. They can be bent easily. Also make sure the gasket for the blower is intact. Or replace it. Otherwise it will leak air and not blow as forcibly out your vents.

[@HorsepowerHouse]

And if you tried cleaning your evaporator, as well as flushing out the entire chamber, and your air conditioning is still dripping onto your passenger floorboard, this likely means you need to replace pretty much all of your air conditioning unit in the engine compartment. It probably means your dryer / accumulator is worn out, but if you're going to start replacing that, you might as well replace everything else in the engine compartment relating to your air conditioning system. I noticed that the top of the evaporator chamber was frozen on mine. But after I replaced the compressor, condenser, dryer, and all hoses in the engine compartment, the problem went away. I know it sounds like a lot. But if your vehicle is 20 or 30 years old, and your air conditioning system is still original, it is probably time to replace all of it. My 30 year old truck now will freeze me out of it even if it is 95 degrees outside. I am tickled to death that it works so well now. Check out my other videos and I have all kinds of more info about it.

[@cowchux]

Makes the Cab smell so much better after giving the compartment and evaporator a good wash with dimple green or purple power.

[@jonscott831]

I used a bamboo skewer to feel around the corners inside the chamber with the heater core, abd found it was bigger than i expected and filled with tree debris. I pulled out as much as i could, flushed the core out with foaming bore cleaner and washed it out with the hose. I trsted to be sure it would drain. Thanks again, dude. I guess i dont need all this refrigerant now.

[@JonnyDIY]

Awesome, nice job 👍 You're welcome, happy to help. Amazing how much of a difference cleaning it makes

[@wcjcnc]

I did this. The fins on mine were covered with a blanket of wet slimey crap. I used foaming A/C cleaner and a small brush and a vacuum cleaner. Worked great. Much more air coming out of the vents.

[@JonnyDIY]

Awesome, glad you got it working a lot better 👍 need it with this heat! 🥵

[@grntchstrmdws]

Amazing. It should be this easy on all cars. Thank you for this.

[@JonnyDIY]

You're very welcome, happy I could help 👍

[@28704joe]

Consider instead of degrease and water, set vent setting knob to face/upper body, take dash off, take all vent registers off and plug all but center one with rags, take blower motor out and get in there with appropriate brush and while brushing put nozzle of strong leaf blower into center nozzle. While you're brushing all the stuff you knock off will blow out toward you. I did this and got a perfectly clean evaporator.

[@JonnyDIY]

Good idea, thanks for sharing 👍

[@Captain_B747ABC]

Men!!! That's what I'm looking for! Thank you dude!

[@JonnyDIY]

You're welcome, glad I could help you out 👍

[@1965bruiser]

Thanks brother this was very helpful and simple I’ll try it on my ‘97 K1500 tomorrow

[@JonnyDIY]

@@1965bruiser You're very welcome! Glad I could help. Good luck! 👍

[@MakeItMike]

Thank you sir. I'm gonna do this for my parents Tahoe.

[@JonnyDIY]

You're welcome, glad I could help you out 👍 Good luck with the project

[@Fixnstuff24]

Hey man !!! I know this vid is 2 years old. So I probably won't get a response, but I cleaned out that whole thing in the video, first grabbing loose stuff, then washing it out. And the amount of air it blew didnt change at all, and if has a new blower motor high pressure and low pressure line

[@JonnyDIY]

Hmm it should at least blow colder if the AC is functioning correctly.

[@Fixnstuff24]

It blows cold, just not hard, like at all, especially the driver side vent on the left of the steering wheel, even if I put a paper in front of it, it doesn't even move the paper, do you think that all of the fins are screwed up on the evap core ? I cleaned absolutely everything out like in ur video ^

[@JonnyDIY]

@@Fixnstuff24 Im thinking its the resistor for the blower motor. That's usually the culprit to weak blowing. Its behind glove box on top of ducting. I'd start there. Then last thing would be the actual fan switch

[@Fixnstuff24]

@@JonnyDIY okay awesome, how would I go about testing the resistor ?

[@JonnyDIY]

@@Fixnstuff24 will need a multimeter to test the resistance or you could just gamble and try a new part. If the blower doesn't seem to blow full speed or if it only seems to work only on certain speeds I'd suspect it was that.

[@snach1983]

I just cleaned out my blower compartment.i would say the hardest part were the small bolts at top right and right side bolt.the beforw and after is not extreme but certainly feel a difference

[@JonnyDIY]

Yeah those lil bolts are buggers. Yeah nothing crazy but mine was definitely cooler. Wish these cars had filters

[@1estorge]

Thanks for the video you saved me a LOT of MONEY you're the best

[@JonnyDIY]

You're welcome, glad I could help you out 👍

[@derekjscott1]

My lad...you're a genius.

[@JonnyDIY]

Not even close 😆 but thank you so much, happy to help 👏👍

[@jonscott831]

This is a great walkthrough!

[@JonnyDIY]

Thank you, happy I could help 👍

[@chrisladd7776]

So I have a 2000 denali that has the same plastic covers on the bottom as the 1 in this video. I bought a fresh filter that it called for but no luck reaching where I was told it would be. My wife drives the truck and complains about the airflow. Im going to go the route you just showed and see what I can do. Thanks for the video.

[@JonnyDIY]

You're welcome, good luck 👍

[@anthonycoleman5524]

That was super helpful thanks man

[@JonnyDIY]

You're welcome, happy I could help you out 👍

[@franciscovenosaduarte5590]

Gracias johnny, desconocia, realmente como quitar el motor del caletador, ahora tengo que hacerlo..no es dificil..me doy cuenta que puedo entender lo que dices en ingles..estoy aprendiendo gracias por tu ayuda..

[@JonnyDIY]

De nada 🙏

[@Euro882]

I hope it work from my car, when the weather is hot it's automatically not working when it's cold and you need heater it works actually what am I gonna do about it I driven Alfa Romeo 159 jts?

[@ccfreedomseekerconstitutio8767]

Appreciate the knowledge and help 🆘

[@JonnyDIY]

You're welcome, glad I could help 👍

[@tomascharles5080]

Thanks for the info.

[@JonnyDIY]

You're welcome, glad to help 👍

[@RickyReynolds-y1k]

Great video

[@JonnyDIY]

Thank you! 🙌👍

[@dustinl6838]

So the little white door flap that you moved at 1:52....I need one lol. I jut bought a 98 k1500 and all of my air is blowing into the floor right there. I'm missing that piece and have no clue what it's called to buy one. Please help.

[@JonnyDIY]

Think its called A/C heater blend door actuator 👍

[@dustinl6838]

Not the actuator, the white door flap thingy lol. It right at the foot position on the passenger side. You moved it up and down with your hand.

[@JonnyDIY]

@@dustinl6838 lol sorry. Best bet is to go to local parts store and have them look it up. I cant find a diagram with the name. I would think it would be just the Blend door itself

[@JonnyDIY]

Ok I found some diagram that calls it "Air Inlet Valve" try that 👍

[@dustinl6838]

@@JonnyDIY its not a valve. Its a door

[@blue4980]

Can you try a cabin air filter mod in this?

[@JonnyDIY]

Good idea you probably could rig up a small filter inside the box. Will have to check it out next time I've got it apart 👍🏻

[@chrisladd7776]

Good luck luck getting the covers off. I got all the screws and still won't come down.

[@josephlabonte8502]

My glove box never closes first try lol

[@davisdecker1968]

Same, and it’s impossible to open

[@johnnymoncivais]

True shit lol

[@jonscott831]

What the hell. I did not expect this brotherhood, but I'm joining the doubleslam glovebox club.

[@fernandohurtado6044]

Was it blowing hot air or how was it blowing before you fixed it

[@JonnyDIY]

It was blowing noticeably warmer and weaker.

[@madslackin]

Thanks man. This helped me out

[@JonnyDIY]

You're welcome, glad to help 👍🏻

[@MultiHairypotter]

Well done and thank u. I needed this information

[@JonnyDIY]

Thank you & you're welcome, glad to help! 👍

[@tricstudios1407]

Thank You So Much It Really Helped A lot I Hope You Get To 5K Subscribers soon

[@JonnyDIY]

Youre welcome glad it helped you. Yeah hopefully by the end of Summer Ill have 5K. Thatd be awesome! :)

[@tricstudios1407]

You’re Welcome I Hope You Get 1M By The End Of The Year You Are So Good At Informative Videos, Because You Get Straight To The Point Unlike Other Channels That Spend 10 Miniutes Talking When You Get Straight To The Point

[@JonnyDIY]

Thanks Jay. I try not to talk too much in my videos unless I find the information to be helpful/useful.

[@tricstudios1407]

Also My Name Is Tommy Jay You Can Call me Witch ever one you want.

[@randycobb940]

L LLL

[@pablovalenzuela4278]

Good video thank u my friend!!

[@JonnyDIY]

You're welcome, glad I could help 👍

[@richardgalli7262]

Just an observation, the debris needs to be pulled back not forced into the evaporator. Possibly a vacuum source could be used to pull the crud away and not force it into the unit.

[@JonnyDIY]

Yes, a shop vac would work great. If you fo spray it, spray lightly like I did to clean 👍🏻

[@alliegater221]

Can you tell me where a bag would be stuck under there?? I can hear the bag when I try and turn the ac on through the vents, have been messing with this over a year, new blend door actuator, cleaned out this part on your video. I feel defeated! Please help lol.

[@JonnyDIY]

Hmm. If not there by blower motor I'd say between there and the actual vents in the car. Try and isolate the sound listening through each vent to try pinpoint 👍🏻

[@fandechavalones3022]

Is this why my heater might not blow hot ?

[@JonnyDIY]

Possibly if fan's clogged. Few reasons heat couldnt be working. Heater core, engine not warming up from stuck open thermostat, vent door blocked, sometimes theres electronic valve that breaks. Best to troubleshoot your make and model

[@jeffsommers59]

I just replaced the blower motor on my 1991 K1500 and did not know th

[@jamesmedina2119]

I had a ticking noise when i turned my fan on, so i removed the fan & found a piece of walnut shell in the compartment. Mustve been a mouse work

[@JonnyDIY]

@@jamesmedina2119 😆 those dang critters always getting into the air filter boxes and the blower motors. Lucky he got out in time before you used heater 🐀💀🤣

[@alexguice7859]

How do you get to that drain to make sure it’s not clogged?

[@JonnyDIY]

Its just a small lil hose under passenger side floorboard.

[@HorsepowerHouse]

The drain hose is on the other side behind the firewall in the engine compartment. But I can guarantee you, if that is clogged, you have more issues inside the evaporator chamber which is underneath the dash behind where the blower is located. I had to do this as well. And that area was loaded with Pineneedles and leaves and debris and what not. Not easy to get to. See my video on how I did it.

[@sperchucker92]

@@HorsepowerHouse what is the link to the video? You have a lot of videos to sort through…

[@crawfislk]

Suggest using some sort of antibacterial spray, water w bleach or ammonia. Bacterias love to grow on AC scale.

[@jsajeev]

Bro, my Santafe's blower motor produces increased functioning sound when I turn the speed knob up, but it makes no effect on the amount of air comes out of the vents. I can really hear the air being leaked or redirected or opposed somewhere above the glove box. Any thoughts on it ?

[@JonnyDIY]

One of your flapper doors may be stuck partially shut. Bang your hand against the area and a lot of times itll pop back fully open. If that doesn't work youll have to take glove box out and check ducting. It can also be a worn blower motor resistor

[@jsajeev]

@@JonnyDIY Thank you for your reply. I just checked it now and everything is fine. As you said I strongly doubt it's caused by the flapper door malfunction. As the blower sounds (air blowing sound) to be responsive always when I turn the fan speed knob, the resistor should be fine rite ?

[@JonnyDIY]

Yes if the fan speeds all work it isnt the resistor, but sometimes when they start going out not all speeds will work or only low speeds work

[@jsajeev]

@@JonnyDIY Ok. Thank you for your time. Liked and subscribed.

[@msmonileon]

what about 99 Tahoe will that work?

[@JonnyDIY]

may be slightly different, but it will be very similar procedure

[@user-ox6zk2qq2u]

Thanks! very helpful.

[@JonnyDIY]

Youre welcome, glad it helped

[@sancholowera]

Not Gonna Front, That Hose Made Me Double Take. Think I Have Whiplash 😂

[@JonnyDIY]

that thing had power 😂👍🏻

[@Arctail]

Does anyone know what might be causing this knocking/grinding sound behind the blower? There's a flap that opens and closes to switch from circulating cabin air to pulling fresh outside air. It almost sounds like it's still trying to close even though it's closed. And it makes this knocking grinding sound. Someone in the comments mentioned the blend door actuator, but that's not close enough to the sound. Thanks in advance!

[@JonnyDIY]

Sounds like the door, the foam weatherstripping on the door has probably worn off so its just plastic hitting plastic making the noise

[@Arctail]

@@JonnyDIY thanks for the reply! I'll check it out!

[@Arctail]

@@JonnyDIY that doesn't seem to be the case; I checked it out again and it makes the sound even when I stop the flap halfway with my finger

[@JonnyDIY]

@@Arctail apparently there are multiple doors on system that open and close to differ between different functions like defrost, feet, regular. One of those doors probably not functioning. Each has its own little motor

[@watchthis8203]

Guarantee your actuator door. Find out which one by feel when it's making the sound and replace it. Pray it ain't your blend door actuator behind the cup holder... Best of luck

[@joshuahall6873]

Great video. After following your steps and putting it back together, I tried to start my truck and it won’t. Looked around for solutions and some said it might be related to poor grounding. There is a ground to the fan but would this cause my truck not to start?

[@JonnyDIY]

No I wouldn't think so. But maybe you jostled another ground to computer etc. I would double back over all your work and check all connections, then check battery cable connections. Make sure theyre all tight. If you have side posts on battery I would check those. Ive had issues with those preventing truck from starting. And had to disconnect them and clean and reattach them. Even though they were tight it still wouldn't start til I removed and re clamped. Start simple. Also if you have an alarm system sometimes that can act up

[@marioatrucking]

Nice. Thanks 😊

[@JonnyDIY]

You're welcome 😀👍🏻

[@danakibby627]

88 to 98 is not the same process for the blower motor. 94 and older you have to loosen the dash on the bottom to get the blower motor back in 95 a newer the dash is higher

[@ruthleonataylor1716]

Not a box Chevy genius!

[@JonnyDIY]

Thank you! 🙌👍

[@handymanmaloy]

This dude sounds just like Mathew macconaughey🤣🤣

[@JonnyDIY]

😆 Alright alright alright 👍

[@MrRod0]

I DONT THINK ITS GOING TO HELP THE MOTOR SPEED BLOW BETTER! BUT CLEANING THE SMALL RADIATOR HELPS!

[@JonnyDIY]

Mine blew harder by cleaning, it must have been restricting the flow somewhat 👍

[@mattbliven5345]

Good video thanks

[@JonnyDIY]

You're welcome, happy I could help you out 👍

[@musicluver1979]

Ahh. So much debris the size of a dinner salad

[@AWIERD1]

Having the AC blow harder doesn't necessarily mean it blows colder. It only absorbs and rejects so much heat out of the coil and by increasing CFM it's just going to blow more warmer air.

[@JonnyDIY]

You're right. Though cleaning the evaporator does improve cooling at least in my experiences.

[@gregchapman7438]

When an evap coil is blocked it will freeze up and shut the a/c off due to evap temp sensor. So by cleaning the coil and allowing more airflow the temperature would actually decrease because the system stays running without freeze up.

[@harshalsb955]

Hi bro plz make a video on how to cool the blower for car for cool air without ac

[@JonnyDIY]

Ohh mann youd have to fill that area by blower motor with ice, but youd probably run into drainage issues. No AC I suggest some ice cold drinking water, and a spray bottle with ice water to spray yourself and a towel for sweat.

[@harshalsb955]

Thank you so much, but it's for car 🚙 and there is no more space and. I need it for continuous operation . I was try lots of things but I can't get good results, it's on your own any idea

[@harshalsb955]

Thank you for your response

[@JonnyDIY]

Might wanna try making a small "bucket swamp cooler" you put ice in bottom of small bucket with a few holes around base and a small fan on top to suck air through and over the ice. Tons of videos on how to make on KZbin

[@carlosavila7175]

Hey Mann when I turn my ac on a very loud noise sounds so if I change my blower motor it won’t sound anymore

[@JonnyDIY]

Its possible. It could be starting to fail. I would remove the blower motor and test it. Super easy to test just hook up wires to battery. Then if makes the noise replace it. Blower motor resistor usually needs replacing around same time as well

[@rebuilders22]

I've seen a lot of these trucks with a misaligned blend door actuator. Tries to keep closing door even after door is closed. It makes a light roaring sound, much like a broken blade on fan. More audible when fan on low vs high. Just a tip, seen many ppl replace blower to realize it was actuator all along

[@HorsepowerHouse]

Loud ticking noises could just be debris inside your evaporator chamber which means you have leaves and Pineneedles and what not touching the blades of your blower. This is how mine was. And I thought my fan was ruined. But it was really just all the debris inside the evaporator chamber. What you need to completely clean out to do this job correctly. Otherwise you will have to go back in there again. No thank you.

[@matt81z28]

88-91 is completely different

[@JonnyDIY]

Thats Matthew will check it out next time working on 1 🤙

[@selinawoodall4804]

Will this work for a 1995 Chevrolet Lumina?

[@JonnyDIY]

Same basic principle should work. Im not sure if its the same setup but Im sure its quite similar

[@selinawoodall4804]

Jonny DIY Thank you very much!!

[@FIGHTINGGAMER]

There's probably no way to make any ac blow hard and silent at the same time

[@JonnyDIY]

No but by making it run colder you dont have to run the fan blower as high

[@FIGHTINGGAMER]

@@JonnyDIY yeah that's cool it would be real cool if some how they make future technology to make ac silent but blowing hard like make the motor in the ac silent like noise cancelation

[@JonnyDIY]

@@FIGHTINGGAMER good idea, I'm sure it'll be a thing in the near future

[@kathrynwegener7685]

Any chance your related to Matthew McConaughey?...lol

[@JonnyDIY]

Alright...alright...alright 🤣👍🏻

[@acc9660]

This was not in no way making a blower blow harder !! No way cause these old chevys already don't blow hard they don't have the cfms to do so. Even with a new blow motor . There should be a optional faster blower motor for these trucks . Cleaning the ducts just makes things work right not blow faster . True story

[@JonnyDIY]

youre right, underpowered for size. But cleaning does bump up cooling and fan power some. At least in my case it did 👍🏻

[@hotsauce8671]

Great

[@petenagel8831]

I did that didnt work

[@JonnyDIY]

Hmm if it didnt help and blower still weak I would replace blower motor and blower motor resistor

[@suavehouse5150]

I have heater but no cold ac blowing out what can it be?

[@JonnyDIY]

Hmm well a lot of things could cause ac not to work. Maybe leaked all refrigerant out or compressor could be shot. If you can its best to get an AC diagnoses

[@JonnyDIY]

+Chris Farley Thanks so much for the kinds words and the tips to make videos better. I'm trying to get better. Ive got a bunch of work to do to my old 88 toyota pickup 4x4. Hopefully those videos will be popular and drive my content up the list.

[@HorsepowerHouse]

You take the vehicle to a shop and have them diagnose it. Otherwise you will be throwing parts at it and wasting a lot of time and money. Been there done that too.