A failed heater blend door or actuator can cause the temperature control for the HVAC system to stop working. A clicking sound from the dash area would commonly indicate an actuator fault. If the heater gets stuck on the hottest setting, the heater blend door may be broken requiring replacement of the heater box to repair the issue.
Resources for the Repair and Maintenance of your 2008 Mercury Mountaineer
2008 Mercury Mountaineer
2008 Mercury Mountaineer Problems
The rear wiper may stop working. This could be due to a rear wiper motor that has failed requiring replacement.
Our technicians tell us the spark plugs in this engine can be very difficult to remove. Ford has issued a service bulletin (08-7-6) to address this issue, which includes a recommended procedure on how to remove the plugs. Failure to follow the recommended procedure can result in the one or more spark plugs breaking off in the cylinder head.
The recommend procedure is as follows. Using this procedure will greatly reduce the chance of breakin...
2008 Mercury Mountaineer Recalls (Recent)
RepairPal Expert Overview:
A bolt securing the transmission oil cooler lines to the transmission may not have been sufficiently torqued during assembly. If the oil cooler lines separate from the transmission and transmission fluid contacts the catalytic converter, a fire could start. Dealers will inspect and tighten the transmission cooler line attachment. The recall began August 30, 2007. The Ford recall number is 07S56.
2008 Mercury Mountaineer Questions and Answers
I was driving last nite and was coming to a light with a car in front of me so I was applying brake, all of a sudden the interior dome light came on and my driver seat moved all the way back by its...
This vehicle began having a problem starting in April 09 and after several repair attempts at three different Mercury/Ford dealerships, the problem still exists. The first two times it was taken t...
back seat belt is locked.
I am getting Check Engine Light, I used my scan tool and got his Error Code:
1- P0171 -- FUEL TRIM TOO LEAN (BANK 1)
2- P0174 -- FUEL TRIM TOO LEAN (BANK 2)
What happened I was driving and n...