2003 Mercury Mountaineer Repair and Maintenance
A guide to problems, costs, maintenance and repair for your 2003 Mercury Mountaineer
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2003 Mercury Mountaineer ProblemsHeater Stuck on Hottest Setting Due to Broken Heater Blend Door
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.
A coolant leak may develop from the radiator. Ford has released and updated radiator and powertrain control module (PCM) software update to address this issue. The software update includes revised cooling fan operating parameters. Failure to complete both service procedures may result in repeated radiator failures.
The intake manifold O-ring gaskets commonly leak, causing stalling and poor idle quality; the Check Engine Light will illuminate.
2003 Mercury Mountaineer Questionshow do I reset my oil change req. light if it wont display the oil % life left (1 answer)
Every time I try to reset it, it won't display the oil % life left. I press and hold reset and it just goes on to the next step of the system check.
2003 Mercury Mountaineer RecallsFord Recalls 2002-2003 Ford Explorer and Mercury Mountaineer Vehicles for Liftgate Glass
Ford has recalled certain 2002-2003 model year Explorer and Mercury Mountaineer vehicles for possible issues with the liftgate glass strut brackets and glass hinges. On certain vehicles, the liftgate glass strut may come off or the hinge may fracture. This can cause the glass to fall from the liftgate, which may lead to personal injury. Dealers will replace the liftgate glass strut brackets and glass hinges.