Heater Control Valve operation and testing

[@richcollins513]

Thank You very much, i have seen many replacement videos but you are the only one to explain operation of the valve. +1

[@bubbat4765]

Thank u for the explanation of the process. The valve was leaking by the screw holding it in place. It was loose, I tightened it n no more leak. But you explained that the gasket gets worn and starts leaking. That lets me know the valve is beginning to give out n needs replacing. Appreciate your knowledge n sharing your expertise. May God bless you!

[@niradz]

Thank you thank you! I now know what it does and could diagnose and find the leak, new part is on order.

[@jacobgonzalez4419]

This is exactly the video I was looking for! Mine is leaking coolant. Shop thought it might be a head gasket leak. Wheew!

[@ChrisThomas-tz8jr]

What is the part # for the valve you have in your video?

[@gilolivarez7129]

What way should the vacuum port should face front or back

[@janicevogt3944]

Where is it located

[@jameskelly2094]

What does that vacuum line connect to off this heat control value?

[@D.JKennedy]

thats what i need to know too

[@the.realARN]

im having problems with the one in my 99 tahoe, i replaced it because it was cracked and leaking, my problem is i cant find where the vacuum line comes from to plug into the port on the top, nor do i know how long of a line to get as it is also long gone

[@D.JKennedy]

i got a 12 inch line and just cut to what I need how ever I also need to know where the vacuum line connects to

[@the.realARN]

@@D.JKennedy i ended up finding where my line ran to, but its an old and beat up enough i decided it would save me headache to just do an electric bypass

[@robertmcguire4302]

thanks, you saved me a lot of headaches

[@mkshffr4936]

How about the electric ones? What kind of signal operates them?

[@JesusRomero-e5f]

I need one for a 2003 CT’s Cadillac 3.2 know where I could get one ?

[@russelllopez9160]

Andy are you able to tell me were that is located in my 2014 Kia sorento

[@vernonmartin3056]

Great explanation!

[@ne0tic]

I’m really confused about why it’s connected to the air-inlet compartment on my 1988 Ford Sierra? Or maybe I still don’t quite understand what it does?

[@steves7896]

What about failures of the butterfly valve itself? There's good vacuum and holding, the stem arm rotates and the stem seals aren't leaking. But the disc, inside the valve body, is no longer fixed to the stem and is stuck in either the closed or open position. Does that ever happen?

[@pauldarrigo4395]

Where is it location on a 2005 Mazda 3? Thanks

[@Madasin_Paine]

Helpful video! So why do these leak? Do they look through the screws? All the tubes seemed closed with clamps and dry. Anyone know about repairing it?

[@indianhillsautotechnology2707]

They leak from the valve shaft Usually not the hose connections. Sometimes they will only leak when transitioning from heat to A/C as well.

[@alowishus180]

Ok, so valve open allows for the heater to run and valve closed is for the A/C??.... I ask 'cuz I have a manual one installed on my '07 Chrysler 300 base model 2.7L. Depending on the weather, I open my hood and open/close the valve before starting my car. Sometimes I forget how to adjust the valve for the weather at hand ..can someone tell me if I am wrong or rite??

[@privateprivate1865]

I was hoping you would say that it can also become a point of vacuum leak. I have a vacuum leak in my 2000 Dodge Durango but I can't find it I'm assuming it might be linked to the heater control valve if it is at all possible vacuum pressure actuator.

[@indianhillsautotechnology2707]

It is possible that this part is leaking vacuum. Rare, but possible.

[@privateprivate1865]

@@indianhillsautotechnology2707 yeah.. i cant find my leak??

[@alvaropalenciano6147]

Very useful video. I have a problem with my van sending hot air to the cabin all the time, so my guess is that most likely this valve is stuck in the open position and the flow from the motor is running in a loop through the heater system all the time, am i right?

[@indianhillsautotechnology2707]

You could be correct. It could also be a Temperature Blend air door actuator.

[@edmateos17]

80% possibility of a leak with the Vacume system, either a; Unconnected connector, Worn-hose, or Worn-Seals on Vacume system parts.

[@lightasafeather9750]

Mine was my door actuator. Very easy to change yourself! I'm thinking of putting on my old one because my new one fixed my AC but not my heat 🙃

[@jasonrailey8949]

Great info thanks a bunch

[@chopperchuck]

on a 1997 jeep xj where dose the vacuum line that controls this originate from?

[@richardsiu5129]

Passengers side next to heater core and AC hoses. I heard 97s deleted the heater control valve

[@teedsack5315]

you described my exact issue, for once youtube is on my side

[@ricardojimenez9193]

Yeah hi. What causes a heater valve to go bad?

[@arjunaugarow]

Thank you so much for this!

[@ABSVabeautifulsunsetvlog]

Great video….I drive a 2019 Toyota RAV4 snd they’re telling me that mine is bad but I’m not pulling any codes at all. Does that sound right? I am getting an engine maintenance required warning but no codes: and this isn’t the “maintenance required” for the oil change but a message that reads “engine maintenance required” and there’s no way to reset it, I and the dealership both tried.

[@indianhillsautotechnology2707]

This part can fail and not set any DTC's (codes). There is always a way to reset any maintenance light. Are you sure it's not due to any normal service?

[@ABSVabeautifulsunsetvlog]

@@indianhillsautotechnology2707 positive

[@The_Dougie]

2005 Ram 1500 not blowing hot air. At best it is lukewarm. Could this be the issue, or something else?

[@edmateos17]

I hope this info. is a reminder that, when Installed on GM/Chevy's; the Valve is always opened (Extended, Upwards-lever) where Hot Coolant can pass through; included during Heat-settings. Until Vacume is applied (Within a Completely sealed vacume system) to the Canister; during 'Any settings of Cab Cooling'; (as then, the 'lever on the top of the Caniste'r of the "Heater Control-valve" then retracts downward. This is in general info. for proper understanding of its functionality; during Installation on [General Motors], vehicles!

[@wfarmer05]

Freggin thank you. I was so confused and this confirms what my common sense was telling me. 😊

[@PJ-qx5yt]

Thanks! Do you know if this is the case for Ford Explorer? 4.0 SOHC. Slightly different valve, just an in and out.

[@PhantomLife]

Im Very Surprised that your Question just arrived now; Dec. 9, 2024 .....Wow, 3years later. Im not aware of your specific Heater-valve.

[@jbortega1178]

New sub just for explaining so my wife understands....

[@Reptex_cs]

Is this also the part that regulates(not just on/off) water flow when heat is on low/medium/high? My car is constantly heating at full power, regardless of AC.

[@indianhillsautotechnology2707]

I am not sure this part would be your problem. While it is possible it is more likely a temperature blend air door actuator or the door itself. Could also be the control head although its not as likely as the actuator.

[@Reptex_cs]

@@indianhillsautotechnology2707 thanks for your reply, I fixed it and it was indeed the mixing flap/blend door actuator! 👌

[@SwapPartLLC]

Pretty sure that's the source of my mystery coolant leak on my 07 Express. Thanks.

[@indianhillsautotechnology2707]

Hope it helps!

[@SwapPartLLC]

@@indianhillsautotechnology2707 I have the part. Tried to put it in one day last week and couldn't get a pair of pliers on the spring clamps. I bought a set of spring clamp pliers that have the long cable on them. Now I just need to find time again.

[@TheMegaPwn]

​@@SwapPartLLC Vice Grips work great for those pesky clamps

[@D.JKennedy]

i had to replace mine the problem is I don't know where the vacuum line is suppose to connect to

[@randynasalsky9529]

Where is it? O6 allure

[@sbotthaus]

My heat works great but when I switch to cold air it still pumps hot air. I know my AC works because I recently had it serviced. My thought is that the valve is not closing and hot coolant keeps flowing... anyone has a tip?

[@andytaylor6781]

Absolutely splendid 👌

[@jacobfriberg2102]

Does the 90 degree elbow at the end move? Mine came disconnected and I don’t know if it’s broken or is able to move and come apart

[@indianhillsautotechnology2707]

Jacob, There are thousands of different designs of valves so I'm unsure if your elbow is removable or not. Most of them are not removable so if it came off it is more than likely broken. However without seeing it it's impossible to be sure. Have a great day!

[@franciscoadolfo5805]

Great video. It seems that when vacuum is applied the heater core is then bypassed. As I observed the valve position when you pushed the plunger. I am troubleshooting this system in a 2003 explorer where vacuum is always applied to the valve bypassing the core until heat is requested, when vacuum is reduced directing flow to the heater core. I guess they want you to have heat even if the vacuum system fails. For what vehicle is that valve?

[@indianhillsautotechnology2707]

I think it's from a mid 90's Ford Explorer.

[@garryphillips9123]

why don't these plastic vx commodre heater control valve last very long

[@BladeGorilla]

Very helpful. Thank you.

[@mostHigh23]

I have a 1998 Lexus LS400. My heat just went out last week I did some research and tried to troubleshoot a few things I believe it's my heat valve or the heat blower/ fan. My father is a mechanic as well he is the one who told me about the heat control valve. My car is not getting hot which is a good thing but I know I need to get it fixed immediately. Do you have any clue on how much it would cost? Thanks

[@indianhillsautotechnology2707]

For accurate pricing information please contact your local parts supplier or service center. We are unable to give estimates on this platform. Sorry!

[@Cars4theLo48]

Can I remove the 2 Phillips screw and detach that circle valve part? I think mine is leaking from there but I don’t want to change whole part

[@indianhillsautotechnology2707]

I don't think this valve has any serviceable parts.

[@dannypalmer7701]

Wispering?

[@shawnlibby675]

What is that pressure air tool you're using I like that

[@indianhillsautotechnology2707]

It is a hand held vacuum pump. They are available at most parts stores or tool suppliers.

[@Cars4theLo48]

Or is there any way to change the valve seal? Without replacing that whole unit

[@indianhillsautotechnology2707]

Usually this is sold as a unit and intended to be disassembled.

[@PolishAlexx]

Looks like very little vacuum was needed to actuate it. I'm looking to engineer one for performance reasons; whereby a turbocharger while in boost will force the valve open to redirect coolant flow destined for the water pump to the engines main radiator. Are you aware of any valves that might act in this nature?

[@indianhillsautotechnology2707]

I am unaware of any of these that operate under pressure. If you find one let me know!

[@andrewt.c.wilson808]

nice explanation .. of elementary technology .. but you said it was in the engine compartment .. mine was located on the roof, just forward of the moonroof .. maybe I have an limited edition ... seriously was hoping this was an repair of electronically controlled solenoid valving .. as we have one hard to located .. maybe be force to restore it ..

[@marck0060]

On the roof???? What car do you own?

[@AchalPawar]

How much pressure dose this valve deals with? Can we glue the broken nozzles of these valves?

[@indianhillsautotechnology2707]

It would be the same pressure as the cooling system. That pressure amount would be listed on your radiator or degas bottle cap. We do not recommend gluing any part of the cooling system.

[@lamontvalentine5140]

Nice video I don't have leak but heat blows cold air in park but driving heat works better. 2012 silverado 50k on it. This should be the problem you think?

[@indianhillsautotechnology2707]

I don't think that would be your problem.

[@lamontvalentine5140]

Thank you I figured it out. It was heater core needs to be flushed 😳

[@indianhillsautotechnology2707]

@@lamontvalentine5140 Excellent! I am glad you figured it out.

[@one7decimal2eight]

@@lamontvalentine5140 seems like really low miles to be having to flush the heater core.

[@everflores9569]

What’s the arrow for?

[@indianhillsautotechnology2707]

Arrows on most car parts are used to indicate the direction of flow. In this case its coolant.

[@jcervantes12000]

And this little peice is a real bear to change. !

[@hiddengloc8388]

Is anyone else having trouble finding the heater control bypass valve? Literally all I need for my 03 CTS to run 😢😢

[@oscarrojas4281]

You like 👍 and a new suscriber

[@vico8246]

Helppppppppp helpppppppp me guys please .I got a 2000 Ford ranger 2.5 .my heater control valve got melted how could something like that could happen .got melted as if there was a lot lot of heat .but this is the 2 heater control valve that does the same .I got a oc2sensor code

[@indianhillsautotechnology2707]

More testing on your vehicle (by a professional) would be needed to verify but, you may have a cracked head or failed head gasket causing combustion gasses to enter the cooling system. This can and will melt the Heater Control Valve.

[@nicholashubbard2239]

Thanks you sir

[@all-about-programming]

Thank you so much

[@billyjohnson5947]

Thanks!!!

[@billyjohnson5947]

Thanks!;!

[@longbow60435]

I replaced 3 in 4 years,,,I'm in fl...I'm going to by-pass this crappy invention ,,,I don't need heat or the headaches,,,thx GM.

[@tintdr]

Couldn't you just push it in and put ypur finger over the hole and see if it holds

[@indianhillsautotechnology2707]

That can check to see if it holds vacuum but does not prove the valve has the ability to move under vacuum. Many vacuum operated systems will get debris or carbon in them. This can cause them to hold vacuum but not transition from hot to cold. Good idea though! Your finger is better than nothing if you don't have a hand held pump.

[@dannypalmer7701]

Dont wisper! Just show how!

[@bradhall7418]

Bro drink some water please