Dash heat and A/C in 2004 E450 not blowing

Hmm that is my old MH in my signature line... I edited but I guess it didn't take! :-)

I had the same thing happen with our 2003 E450 on our last trip two weeks ago. I had the same thing happen with our 2003 E450 on our last trip two weeks ago. I found this UTube Video that was posted about the same problem with a 1997 E350. After watching the video I found that the run of the vacuum line in our E450 is the same as the video shows. That's as far as I got to date, but I believe the break or leak in the vacuum line is in the hidden section mentioned in the video. In any case the bypass repair made by the person who posted the video is an easy DIY to do if I can't find the actual leak point.

jillhop wrote:
Hmm that is my old MH in my signature line... I edited but I guess it didn't take! :-)

Did you hit submit changes at bottom fo page?

Thanks for the input! I will pass it on to my mechanic.

ronfisherman, I thought that I had hit "submit changes" but went in and did it again. This is the test. :-)

I bought a new vacuum reservoir and check valve. Then mounted it inside the fender well with double sided tape.
Be sure to use only Genuine Ford parts.

jillhop wrote:
Thanks for the input! I will pass it on to my mechanic.

ronfisherman, I thought that I had hit "submit changes" but went in and did it again. This is the test. :-)

If it did not take this time. Check to see if size of picture is too big.
Check out this help thread for profile and signatures.

I wonder if the vacuum leak was caused from rodents chewing on the rubber tubing.

Does the fan run but no air comes out, or is the fan not running at all?

If the fan isn't operating, the failure more likely is in the switch or resistor (which may be a single part containing both—I don't know offhand how Ford does it for the E series). That is a very simple and straightforward fix usually assuming the part isn't completely buried.

If the fan is operating but air is coming out of the wrong places, the vacuum problem is very likely to be the cause.