2008 Explorer XLT - A/C air swaps to defrost when under strain

Asked by Oct 21, 2009 at 09:23 PM about the 2008 Ford Explorer XLT

Question type: Maintenance & Repair

My '08 Explorer has 60k miles on it. When driving under normal conditions with
the A/C on, the air blows normally from the console vents. When there are high
RPMs (such as climbing a hill or prolonged accelerating)the air swaps from the
front vents to the defrost vents. One repair shop claimed they repaired it
when they replaced a leaking vacuum hose, but it still occurs (though not as
often). There is no Haynes Repair Manual for the '08 model. I also cannot find
evidence the late model Explorers have a vacuum pump.

Any ideas on what I should look for? I can't find a schematic for the engine
(not in the owner's manual) so I'm pretty much at a loss.

4 Answers

11,705

I am assuming this is a 4.0 engine. What the manufacturer made to help elliviate this problem is a vacuum tank to hold vacuum under load conditons. Check to make sure all OTHER vaccum lines are conected properly and that they are not damaged going to this vacuum tank and that the vacuum tank did not get damaged by some previous "other" servicing. Good Luck

7 out of 7 people think this is helpful.
25

There should also be a one way valve on the vacuum line to the system, sometimes these stuff up and when under load, the vacuum drops and thus drops the vacuum in the aircon system too

2 out of 2 people think this is helpful.
11,705

John has a point - I do not think an 08 would be blocked but perhaps the previous repair shop removed it when it broke and did not reinstall one just 'teed' it all together ... I like this thought thanks John

I had a shop pull the reservoir off and test it. It held pressure without any leaks. An idea the shop had (and an expensive one) would be to pull the dash off and inspect for the problem that way. Any suggestions?

Your Answer

Add photo

Related Questions

Explorer

Looking for a Used Explorer in your area?

CarGurus has 74,854 nationwide Explorer listings starting at $1,499.

ZIP:

Search Ford Explorer Questions

Ford Explorer Experts

#1 OJ
OJ
Reputation 9,950
#2 Tom Demyan
Tom Demyan
Reputation 4,010
#3 tennisshoes
tennisshoes
Reputation 2,290
View All

Related Models For Sale

Used Jeep Grand Cherokee
1,046 Great Deals out of 73,791 listings starting at $950
Used Ford Expedition
432 Great Deals out of 25,274 listings starting at $1,750
Used Chevrolet Tahoe
570 Great Deals out of 27,521 listings starting at $1,500
Used Ford F-150
2,246 Great Deals out of 209,140 listings starting at $1,499
Used Ford Edge
690 Great Deals out of 51,715 listings starting at $3,995
Used GMC Acadia
516 Great Deals out of 46,865 listings starting at $3,900
Used Ford Escape
1,376 Great Deals out of 95,487 listings starting at $995
Used Dodge Durango
255 Great Deals out of 23,015 listings starting at $1,500
Used Toyota Highlander
346 Great Deals out of 25,817 listings starting at $2,900
Used Honda Pilot
347 Great Deals out of 21,028 listings starting at $2,199
Used Toyota 4Runner
269 Great Deals out of 20,844 listings starting at $1,995
Used Nissan Pathfinder
293 Great Deals out of 22,313 listings starting at $2,250
Used Chevrolet Traverse
506 Great Deals out of 48,023 listings starting at $5,700
Used GMC Yukon
347 Great Deals out of 17,218 listings starting at $2,500
Used Ford Explorer Sport Trac
61 Great Deals out of 1,846 listings starting at $2,200

Used Cars For Sale

2017 Ford Explorer XLT For Sale
17 Great Deals out of 12,174 listings starting at $24,724
2016 Ford Explorer XLT For Sale
15 Great Deals out of 521 listings starting at $19,988
2015 Ford Explorer XLT For Sale
33 Great Deals out of 954 listings starting at $17,500
2014 Ford Explorer XLT For Sale
64 Great Deals out of 1,492 listings starting at $13,500
2013 Ford Explorer XLT For Sale
33 Great Deals out of 731 listings starting at $9,995