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

118,005

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.
118,005

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.
25

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.

2 of 2 people found this helpful.

Your Answer

E-Series Wagon

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

CarGurus has 1,176 nationwide E-Series Wagon listings starting at $2,350.

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
80 Great Deals out of 3,363 listings starting at $2,200
Used Chevrolet Express
70 Great Deals out of 5,018 listings starting at $3,500
Used Chevrolet Express Cargo
69 Great Deals out of 10,320 listings starting at $2,450
Used Ford F-150
3,206 Great Deals out of 226,379 listings starting at $1,250
Used Ford F-250 Super Duty
502 Great Deals out of 47,167 listings starting at $1,817
Used Ford E-350
240 listings starting at $5,000
Used Ford Transit Cargo
130 Great Deals out of 17,333 listings starting at $9,995
Used Ford F-350 Super Duty
413 Great Deals out of 26,425 listings starting at $2,500
Used GMC Savana
5 Great Deals out of 1,099 listings starting at $4,995
Used GMC Savana Cargo
26 Great Deals out of 2,727 listings starting at $2,350
Used Ford Expedition
455 Great Deals out of 18,037 listings starting at $1,500
Used Chevrolet Silverado 1500
2,868 Great Deals out of 161,874 listings starting at $1,295

Used Cars For Sale

2014 Ford E-Series Wagon For Sale
4 Great Deals out of 150 listings starting at $10,900
2013 Ford E-Series Wagon For Sale
4 Great Deals out of 135 listings starting at $8,950
2012 Ford E-Series Wagon For Sale
5 Great Deals out of 143 listings starting at $7,900
2011 Ford E-Series Wagon For Sale
120 listings starting at $5,500
2010 Ford E-Series Wagon For Sale
10 Great Deals out of 118 listings starting at $5,499

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.