Auto HVAC Vacuum Repair

Рет қаралды 219,673

10 жыл бұрын

Auto HVAC Vacuum Repair
LINKS:
www.autodiagnosticsandpublishi...
www.autodiagnosticsandpublishi...
For many years, automotive HVAC or climate control systems, were vacuum based, when it came to all the air flap actuators. The vacuum source was the engine vacuum itself, and a vacuum reservoir was also used. Other manufacturers, like Mercedes Benz, used a dedicated vacuum pump to generate the required vacuum, used to operate the air flaps. Regardless of where the vacuum comes from, we will now discuss this system in depth.
The main purpose of using vacuum in the car's HVAC system is for flap door actuation. The newer way to do the actuation of the flap doors, is through electrical power, or using motors. Why was vacuum abandoned for the most part? The answer is due to control. Electric actuators afford a wider range of control. Also, the vacuum actuator technology exposed here is more costly to implement.
There are three basic components to any vacuum HVAC actuation control system. These are, a vacuum source, either engine or pump, the vacuum diaphragm actuators, and the ...
Get the whole story right here in this video... Enjoy...

Пікірлер: 52

@kidyugi1 3 жыл бұрын

I think this is the only video that talks about vaccume for auto hvac

@ADPTraining 3 жыл бұрын

Most HVAC systems are now electrics. www.autodiagnosticsandpublishing.com/

@ADPTraining 10 жыл бұрын

Thanks... Keep posting and commenting...

@ryans413 Жыл бұрын

Pros to this system is they hardly ever fail you can have a 20 year old car and all the blend doors will still redirect air just like it did when it rolled off the assembly line. All the electric controlled blend door fail all the time or get stuck and too fix them you gotta pull the entire dash out.

@ADPTraining Жыл бұрын

Agreed

@jamesal-hamadani221 5 жыл бұрын

Man! Thx Working on my 1978 ford thunderbird. This was helpful

@ADPTraining 5 жыл бұрын

You're welcome.

@sivucit 10 жыл бұрын

VEry good information. Nice. Keep it up.

@CodyPeterson-jd3sk Ай бұрын

Very helpful thanks

@joecorrie1 3 жыл бұрын

great informational video, thank you.

@ADPTraining 3 жыл бұрын

Thank you... autodiagnosticsandpublishing.com/

@wyattandwill12 Жыл бұрын

Great video. My HVAC system in my 98 Cherokee seems to all be working except for the mode controls. I need to check the reservoir and all the connections. However, there’s nothing coming out of the vents besides the defrost (which is fail safe of course) and maybe a little bit of air that creeps through closed vents, I wonder if the issue’s on the cab side of the firewall.

@ADPTraining Жыл бұрын

Possible...

@wadep9916 6 жыл бұрын

2001 Ford Escort under wide open throttle will lose air flow from Center vents, I have checks all the vacuum hoses at the engine to the EGR valve into the AC switchover valve, I am unable to find a vacuum Reservoir that's exactly what my car is doing it's not holding vacuum.. this is a very good video thanks hoping I can find the reservoir valve or it never had one I bought this at a used car lot..Wade.. does anybody know where the reservoir valve is at?.. I have open the glove box Tray all the way to the down position I still can't find that Reservoir..

@johnnytsunami177 5 жыл бұрын

Is probly on your back fire wall where everything tees off

@OldSchoolNoe 2 жыл бұрын

very nice, Scenario: You just purchased a vehicle from 1997. The previous owner tells you no information regarding the AC system. You turn it on and no air blows out? What do you do? First Check wiring (relays and fuses) Second Check Vacuum Lines and Vacuum Canister Third hook up a manifold gauge and verify refrigerant levels. I consider those your top 3 culprits, from there it could be the blend doors, actuator, ac switch disconnected, etc.

@ADPTraining 2 жыл бұрын

Seems like a good diagnostics procedural approach, well done.

@bandegifts 9 жыл бұрын

The valve that moves the air has stopped working when the air is on you feeling air at all locations in the car. I have a 2003 Nissan Sentra. Can you help me find in under the hood.

@ADPTraining 9 жыл бұрын

Search out at Alldata or Mitchell.

@daniilmisiruk9 4 жыл бұрын

Where do you buy assist vacuum pump gasket (Hella brand) does someone know.

@ADPTraining 2 жыл бұрын

Don't know

@alejandropalazuelosleis.185 5 жыл бұрын

Estoy tratando de saber como van las mangueritas de vacio de una 1992 gmc sonoma 4.3 .diagrama vacum system.

@ADPTraining Жыл бұрын

Mitchell

@yvesgiraud7663 4 жыл бұрын

Does anyone here know where I can find vacuum line replacements? I have a 2000 class A RV with a 454 Chevy that still uses the old vacuum system for the flap doors in the AC system. Unfortunately, some of the hoses/lines have not aged well and are falling apart. I have looked everywhere for replacements. Any ideas?

@ADPTraining 4 жыл бұрын

Vacuum lines? They're sold in feet or rolls. I don't quite understand your question. If you want ready made vacuum circuit as in the original, probably not. You'll have to replace them one by one.

@yvesgiraud7663 4 жыл бұрын

@@ADPTraining Much appreciated. I was looking for the wrong thing, not realizing what they are actually called. Cheers!

@MrTghaynes 5 жыл бұрын

What is the problem on my 82 olds delta 88 that air only flows from the floor

@ADPTraining Жыл бұрын

Vacuum

@irishoodlums7145 4 жыл бұрын

Outstanding :)

@ADPTraining 4 жыл бұрын

Thank you, visit my website autodiagnosticsandpublishing.com/

@stephanybaisden1306 6 жыл бұрын

My ground on my 2001 Chevy s10 sparked when I turn my a/c on??? Can't find any help anyone know why??

@ADPTraining 6 жыл бұрын

Which ground

@jorgepalacio2388 3 жыл бұрын

i am getting no vacuum from source and ac blows out out defogger only...any suggestions?

@ADPTraining 3 жыл бұрын

Yes, that is what happens if you loose vacuum. That's an easy fix. Look for the vacuum leak. Follow the vacuum hose from the intake.

@markzanetti6228 6 жыл бұрын

Just to contribute to the discussion and those looking for solutions. My 99 E150 blend door problem turned out to be the dash mounted round temperature switch knob itself was broken where the female plastic hole on the back gripped and turned the male control cable mounted inside the control panel. in other words the temp knob was broken even though it turned... unusual problem and resolution for sure but I thought worth mentioning.

@robertocantu792 5 жыл бұрын

2006 ford explorer has no vacuum to heater control valve. Vac. source is good. The black hose has vac. The gray hose does not.The reservoir has and holds vac. All I get is very hot air. The A/C is good. The blend actuator is good. The manual HVAC control unit is good. I need to check the temperature blend door. However, that does not answer why the heater control valve is not getting vacuum. Otherwise everything else works fine. no check engine light on. no vac. leaks detected.

@ADPTraining Жыл бұрын

Switch valves...

@ADPTraining 10 жыл бұрын

We now have a $75-OFF Coupon for the Climate Control Troubleshooter. The special KZfaq code is: KZfaq-HVAC-102013 Just copy and paste this code when purchasing. It is case sensitive, meaning use all capital letters and dashes exactly as it appears here. Thank you all. Mandy...

@jesseplz 6 жыл бұрын

Computer voice is lame but the text helps

@rickyg152 3 жыл бұрын

What about in diesels we dont creat vaccum

@ADPTraining 3 жыл бұрын

Diesels have a separate vacuum pump. They also use service electric for AC controls.

@Bobby-Love 4 жыл бұрын

Computer voice?

@ADPTraining 2 жыл бұрын

@hokiepokie333_CicadaMykHyn 4 жыл бұрын

Who else is here from 2045? Doesn't if just blow your mind that robots and humans still can't talk...

@ADPTraining 4 жыл бұрын

And humans can't still spell properly.

@hokiepokie333_CicadaMykHyn 4 жыл бұрын

+@@ADPTraining... Exactly my point! Android autocorrect is friggin stupid! But... "Can't still..." And you're clowning on me!?!?! I hope you at least made it to Special Olympics this year, lil buddy!

@petesearchy4281 6 жыл бұрын

@pleasecho2 6 жыл бұрын

Why the artificial voice?

@ADPTraining 6 жыл бұрын

I lost my voice while singing Highway to Heaven a while back.

@Roller76 5 жыл бұрын

That was my question. Unfortunately its really irritating. You could've had someone read your scripting. Then it's easier to listen to. Just saying. Also, did you mean, "Highway to hell"?