This worked, awesome, many thanks. I used this other video to get a bit more details (kzbin.info/www/bejne/mpXGi6Grl699ncU) , but used this simplified fix. As you can see in other comments, the vacuum reservoir and check valve are optional - helpful to stabilize setting under high rpm but not really needed and I suspect the check valve may be the failure mechanism. I cut the sleeve, made a small hole in firewall just for red tubing, reinserted sleeve on other side (although probably not needed), and reused complete connector as is. Did not cut the red tube from connector, just twist with a plier.

Confirmed fix on 2013 E350 Box truck. That line runs to a vacuum reserve canister and its so buried in there not worth digging it out and replacing rotted rubber hoses. The vacuum reserve is there for high engine RPM conditions where vacuum is low and keeps the on the setting you have it on during that time.

Less is more

😎This saved my life over here in FL, thank you thank you 😎

This hack worked for me in 2010 RV E450 Ford. Used the existing connectors and bought nothing extra. Went through area near /behind the shroud and filed it smooth. Thank you bigley.

You can separate the firewall engine side from the firewall passenger side at the valve, pull the valve through with a wire taped to it so you can feed it through again. Put a screw in the open hose end of the 3-way valve that is leaking to atmosphere, reinstall it and not have to cut the access hole. I just completed this action with your help.

Thank u so much I did exactly what you did step-by-step. I was able to save the company hundreds of dollars thank you for the support and guidance AC and air is blowing out perfectly.

This worked perfectly,, thanks

This video saved an hvac tech with no a/c in his van for the last 2 months, thank you!

Super easy fix! Worked on my 2013 E350

It worked Thank You Greatly !

Not clear instructions

Thanks 🙏 man appreciate very much you’re awesome 👏

Nice and to the point. Best part of it is it works, just did mine!!

It has to be a microphonic cable

I did the bypass exactly like the video. But instead of solving the issue, it went from 0% airflow going to the vents to 5%. The major airflow still goes to defrost. Any suggestion?

Thanks a lot

Nice, well done.

The reservoir is needed to store vacuum under WOT.

Tengo ese problema ahorita mismo no cambia la dirección del viento simplemente conecto un vacío del motor a esa manguera negra que sale de la pared de fuego

I have a 1998 Ford E-350 Club Wagon with V-8 gas engine. I developed the identical leak in at my vacuum reservoir or line. The vacuum reservoir and built in check valve is actually hidden under and attached my blower/coil unit which is totally inaccessible. It comes from the factory like that:( I removed my battery and battery tray and with a little pressure my existing check valve and lines pulled out from under the blower/evaporator unit. I disconnected the red line from the vacuum control valve leading to the old reservoir and installed my new factory Ford reservoir under my battery tray to the left of the windshield washer reservoir with a body clip. The vacuum port line comes out straight down from the top of the battery about 11 inches. I literally left everything else in place. I liked it so much better than the reroute here. I believe I may end up rerouting the new vacuum line on the passenger side when I have time and relocate my reservoir behind the dash like you did. I would recommend using automotive or high heat aluminum duct seal if you chose to reroute the line thru your insulation by the dog house. Even though the hole is small and duct taped it's still going into the passenger compartment. I didn't have anything to go by when I did this project. I followed kzbin.info/www/bejne/mpXGi6Grl699ncU

It must be a Ford problem, my van is doing the same thing.

Worked for me also. THANKS!!!

Fixed my problem and saved me on a 700 mile trip. Thanks a bunch and smart thinking! also tape does work on that splice.

I just did exactly what you said and had it ready in about 30mins. So I just wanted to thank you sir your a lifesaver

Thank you very much for this helpful video!

This video help me to make an excellent job, thank you

I had a glove compartment so I had to relocate it a little bit different yes it works just fine

Thanks a lot 🙏🏻

100% fully working method, his my new best friend, you don’t need to buy anything, my vents are working again..Amazing work clean looking job done :)

Hoping this fixes my issue. Thanks!!

Thanks

Great video, quick easy fix

Is this similar on my 2008 Ford E-250? Or does mine use a blend door actuator?

Been dealing with the same issue for 2 years . 5 min fix thank you. works great now

Thank you, it worked out well.

Could you not just slip it through the weather strip instead of drilling a hole? It worked for me though

Anyone know if these vans have cabinet air filter?

Worked like a charm! Thx

I just fixed one for this nursing home, and I just had a ton of elderly men and woman tell me thank you. I couldn’t take full credit so they asked me to pass along a “god bless and thank you”. 2019 btw

Didn’t explain 💩

That's nice 👌 I just fixed mine after suffering from the hot weather 😅

Good shit bro. Worked like a charm on my 2012 e250

Everyone is doing shitty bypsss on here whats the actual problem

Solved the issue, thanks

I just fixed my e450 box truck watching this. I like free fixes!

Ford engineers are stupid AF. This issue has been around for a decade and has not been corrected. Why the hell is the default position still the defroster?

Thanks a lot man life saving here in fl gets nasty this time of the year 🤘🏽🙏🏽💪🏽

I was thinking I need the reservoir.

Would I be pulling it off of the firewall and attaching it or off of the connector going up to the top of the motor and connecting it