2003 mercury mountaineer. Vehicle won't shut off when the hvac unit is on. Can remove key from vehicle and will stay running. Vehicle will shut off when I press the off button on the hvac unit.

Asked by Aug 19, 2014 at 06:18 PM about the 2003 Mercury Mountaineer 4 Dr STD SUV

Question type: Maintenance & Repair

3 Answers

18,775

Was this a police vehicle? Does it have "safe idle" (an aftermarket device) installed?

No it wasnt. Found out after alot of testing and troubleshooting that the hvac control unit was back feeding causing the ecm and ignition not to shut down.

18,775

Sounds like a nightmare.

Your Answer

Add photo

Related Questions

Mountaineer

Looking for a Used Mountaineer in your area?

CarGurus has 1,448 nationwide Mountaineer listings starting at $1,499.

ZIP:

Search Mercury Mountaineer Questions

UK Questions

Are you a UK consumer? CarGurus now has a discussion forum in the UK.

Mercury Mountaineer Experts

#1 Tom Demyan
Tom Demyan
Reputation 510
#2 kbro
kbro
Reputation 450
#3 FordNut
FordNut
Reputation 310
View All

Related Models For Sale

Used Ford Explorer
1,107 Great Deals out of 72,088 listings starting at $1,000
Used Ford Expedition
491 Great Deals out of 24,901 listings starting at $1,500
Used Lincoln Navigator
128 Great Deals out of 6,002 listings starting at $2,495
Used Ford Escape
1,366 Great Deals out of 87,086 listings starting at $1,150
Used Chevrolet Tahoe
869 Great Deals out of 28,110 listings starting at $1,700
Used Jeep Grand Cherokee
923 Great Deals out of 66,788 listings starting at $1,500
Used Dodge Durango
381 Great Deals out of 23,255 listings starting at $1,500
Used Ford F-150
3,137 Great Deals out of 208,987 listings starting at $1,200
Used Nissan Pathfinder
495 Great Deals out of 24,576 listings starting at $1,300
Used Honda Pilot
502 Great Deals out of 18,520 listings starting at $950
Used Toyota 4Runner
379 Great Deals out of 20,969 listings starting at $2,495
Used GMC Yukon
571 Great Deals out of 17,253 listings starting at $1,875

Used Cars For Sale

2010 Mercury Mountaineer For Sale
8 Great Deals out of 94 listings starting at $7,950
2009 Mercury Mountaineer For Sale
5 Great Deals out of 32 listings starting at $5,995
2008 Mercury Mountaineer For Sale
8 Great Deals out of 153 listings starting at $3,995
2007 Mercury Mountaineer For Sale
5 Great Deals out of 186 listings starting at $1,499
2006 Mercury Mountaineer For Sale
8 Great Deals out of 216 listings starting at $2,300