I have a 2006 Ford E350 super duty. When driving, with the control on vent or ac, at about 1400 RPM the control switches to high heat defrost. When not accelerating, it will eventually switch back. Any ideas?

Asked by Nov 03, 2013 at 12:08 PM about the 2006 Ford E-Series Wagon E-350 Super Duty XLT

Question type: Maintenance & Repair

6 Answers

114,235

If your air dampers are controlled by vacuum I would suspect a vacuum leak.

2 of 2 people found this helpful.

that is Correct operation...it's an "Idle Up" that you need because the air conditioning compressor is taking away perhaps 18 percent of the horsepower for it's own greedy environmental concerns...think about a room air conditioner....the power....draws a lot of power...well the a/c is the same way....the motor needs more juice for the goose....like totally normal...I wouldn't complain...at least the air conditioner is working~

1 of 1 people found this helpful.

dandyoun is right....the vacuum operated controls have defaulted to a usable setting~ replace black butyl rubber with silicone for long life~

1 of 1 people found this helpful.
114,235

http://www.ford-trucks.com/forums/882747-a-c-moves-from-panel-to- defrost-and-back-under-acceleration.html --- check this out. It appears this is a common problem with vacuum leaks.

4 of 4 people found this helpful.
20

Here you go... https://www.youtube.com/watch?v=O-Wo9fgcBoQ

2 of 2 people found this helpful.
15

I have a 03 E-350 Super Duty XLT 15 Pass. van. After spending near 1K for parts changers, found the vacuum line THRU! the firewall was cracked, resulting in a vacuum loss to the climate control switch. Rerouted the line from the manifold to the supply line feeding the switch. Problem solved!! Now, problem with switching from vent to defrost, then back to vent, again low vacuum from the engine. Solve it by installing a vacuum reserve canister in the supply line under the dash on the passenger side above the area where the feet would be, preferably behind the air bag module out of the way. Small cost for the canister, less for hose, 2 hours labor to R&R.. Make sure canister has (2) two ports on it, one in, one out.

1 of 1 people found this helpful.

Your Answer

E-Series Wagon

Looking for a Used E-Series Wagon in your area?

CarGurus has 1,184 nationwide E-Series Wagon listings starting at $2,999.

ZIP:

Ford E-Series Wagon Experts

  • #1
    dandyoun
    Reputation
    100
  • #2
    TransAm77
    Reputation
    80
  • #3
    BoholMark
    Reputation
    60
View All

Related Models For Sale

Used Ford E-Series Cargo
57 Great Deals out of 2,978 listings starting at $2,500
Used Chevrolet Express
65 Great Deals out of 5,006 listings starting at $3,495
Used Chevrolet Express Cargo
53 Great Deals out of 10,649 listings starting at $2,500
Used Ford E-350
204 listings
Used GMC Savana Cargo
13 Great Deals out of 3,721 listings starting at $2,500
Used Ford F-250 Super Duty
377 Great Deals out of 44,647 listings starting at $1,799
Used Ford F-150
2,315 Great Deals out of 183,061 listings starting at $1,000
Used GMC Savana
4 Great Deals out of 1,173 listings starting at $4,950
Used Ford Transit Cargo
24 Great Deals out of 18,402 listings starting at $7,999
Used Mercedes-Benz Sprinter
3 Great Deals out of 1,897 listings starting at $9,000
Used Ford Expedition
376 Great Deals out of 19,506 listings starting at $1,295
Used Ford F-350 Super Duty
311 Great Deals out of 24,103 listings starting at $2,488

Used Cars For Sale

2014 Ford E-Series Wagon For Sale
3 Great Deals out of 150 listings starting at $10,995
2013 Ford E-Series Wagon For Sale
6 Great Deals out of 148 listings starting at $9,995
2012 Ford E-Series Wagon For Sale
3 Great Deals out of 130 listings starting at $10,287
2011 Ford E-Series Wagon For Sale
3 Great Deals out of 138 listings starting at $6,950
2010 Ford E-Series Wagon For Sale
108 listings starting at $7,200

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use.