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 1998 Mercury Mountaineer
1998 Mercury Mountaineer
1998 Mercury Mountaineer Problems
The rear window wiper may not fully contact the rear window. To fix, replace both the wiper blade and wiper arm.
The rear wiper may stop working. This could be due to a rear wiper motor that has failed requiring replacement.
The intake manifold O-ring gaskets commonly leak, causing stalling and poor idle quality; the Check Engine Light will illuminate.
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A rattling noise from the engine may indicate that the timing chain cassette is worn. Our technicians tell us that installing an updated cassette and timing chain tensioner should correct this concern.
1998 Mercury Mountaineer Recalls (Recent)
Summary: THIS IS NOT A SAFETY RECALL IN ACCORDANCE WITH THE SAFETY ACT. HOWEVER, IT IS DEEMED A SAFETY IMPROVEMENT CAMPAIGN BY THE AGENCY. EQUIPMENT DESCRIPTION: FORD IS REPLACING ALL FIRESTONE WILDERNESS AT 15, 16, AND 17 INCH TIRES MOUNTED ON FORD TRUCKS AND SUVS. FORD REPORTS TREAD SEPARATION CAN OCCUR DUE TO A COMBINATION OF THE SENSITIVITY OF THE TIRE DESIGN TO STRESS, AGING, AND MANUFACTURING DIFFERENCES BETWEEN PLANTS. FORD IS REPLACING THESE TIRES TO PREVENT POSSIBLE PREMATURE TIRE FAILURE. VEHICLE DESCRIPTION: THE VEHICLES LISTED BELOW MAY HAVE BEEN ORIGINALLY EQUIPPED WITH FIRESTONE WILDERNESS AT TIRES OR MAY HAVE HAD WILDERNESS AT TIRES INSTALLED DURING THE FIRESTONE RECALL LAUNCHED IN AUGUST 2000. CERTAIN 1991 THROUGHT 2002 FORD EXPLORER CERTAIN 2001 THROUGHT 2002 EXPLORER SPORT, AND SPORT TRAC CERTAIN 1997 THROUGH 2002 MERCURY MOUNTAINEER CERTAIN 1991 THROUGH 2001 RANGER CERTAIN 1999 THROUGH 2001 EXPEDITION CERTAIN 1991 THROUGH 1994, AND 1997 MODEL YEAR F-SERIES CERTAIN 1991 THROUGH 1994 BRONCO NOTE: BOTH ORIGINAL EQUIPMENT AND REPLACEMENT TIRES ARE AFFECTED.Learn more »
RepairPal Expert Overview:
Ford has recalled Firestone Wilderness AT and Radial ATX tires installed on multiple lines of Ford trucks from 1991 to 2000. On some tires, under extreme conditions, the tread could separate, which can cause immediate tire failure. This may lead to a loss of vehicle control, injury, and death. Dealers replaced the affected tires.
Summary: ON CERTAIN TRUCKS EQUIPPED WITH SPEED CONTROL, GASOLINE OR NATURAL GAS ENGINES, THE SPEED CONTROL DEACTIVATION SWITCH MAY OVERHEAT.Learn more »
RepairPal Expert Overview:
Ford has recalled certain 1997-1998 Explorer and Mercury Mountaineer vehicles equipped with a 4.0L SOHC engine for a potential issue with the throttle body. There is a manufacturing problem with the clearance of the throttle plate and the bore, which could lead to a binding situation. When binding is released, the engine could surge, causing a safety issue. Dealers will replace the throttle body assembly with a revised part.
RepairPal Expert Overview:
Ford has recalled certain 1997-1998 Explorer and Mercury Mountaineer vehicles equipped with a 4.0L SOHC engine for an issue when identifying the proper location to attach a negative jumper cable in the event a jump start is needed. There is a fuel line bracket that is present near the battery that could be used in error to act as the ground for a jump start. Using this fuel line bracket as a negative jump start location could cause overheating to the fuel lines and a potential fire. Dealers will install a warning label to remind operators not to use the fuel line bracket as a jump start location. They will also install a revised alternator bolt bracket as a new and convenient jump start ground location.
1998 Mercury Mountaineer Questions and Answers
where is the transmission relay/fuse located at?
How to replace water pump?
how do i grease th bearings because it squeaks real bad when im driving and when i go to get in it
All parts have been changed out such as upper and lower ball joints, cv axle, wheel bearing, inter and outer tie rod and had front aligment. Stillhas pooping noise in driver side front tire. Any su...
How to fix a transmission indicator needle on the instrument panel shifted to the right .??
1998 Mercury Mountaineer Reviews
are you kidding me??? can someone please tell me how to find and replace my heater core ?? everything is in place,the water is hot and flowing to both lines..but i have no heat....please help me..i dont see the need to replace the heater core..the fluid is moveing fine...what the hell ???
I have a 1998 Mercury Mountaineer that my family bought new. It has low mileage for a 1998 at 99,000 miles. No issues with it whatsoever -- just routine maitenance. I hope to drive it for many miles to come.
Great reliability. Have had car since new. Am now only starting to have a few problems. Have a small rear main seal oil leak (will be a $700 repair). and have an AC freon leak ($ 500 to $1000 repair range). However, I have had car for 12 + years (180000 mles) and have only had one radiator replacement $500, one minor tranny repair ($450) Two minor items I did not fix - radio lite only works intermittantly and lever for drivers seat back has broken off - both are common problems and I have chosen not to get them repaired.LOVE THIS TRUCK - all wheel d(rive is great in snow country, car runs GREAT and burns no oil. Hope to drive it to 250000 miles.
I was able todoa temporary fix AC leak with an additive and the oil leak is just a drip each day in my garage.
I have the 5.0 V8, and it has been a complete dream for a car of its age. It only has about 102K miles, which is low for its year, but I have had NO serious problems whatsoever. The problems I have had:
-Broken Radio Display
-Both the driver and passenger front doors unlock by remote, but do not lock
-The sunroof gets stuck when I close it, so I only pop it up now. It also leaks a TINY bit when it pours
-Bushings make noise, but dealership says its safe to drive, and doesn't need replacement yet
Other than these relatively small things (which could be fixed if i were so inclined) the car has had no issues. I just change the oil, do basic maintenance, and she's good to go. After talking with many people about these vehicles, and doing lots of research, i recommend being careful of the used V6 models. The V6 is better on gas, but tends to have more mechanical issues (4x4, timing belt, transmission). Also beware of the 1995-1997 and the 2002-2005 models. These are the ones they tend to not have all the kinks worked out of yet when they were new, and subsequently tend to have more problems.
Bought the car in 2000 as a lease car that was returned to the dealer to be put on the market to be sold. So I got the car almost new, with only 5000 miles on it. Have had no trouble with it--only maintenance. I would buy another one tomorrow if I could. After 85,000 miles, I am only now having to have repairs on it-mostly maintenance type issues. So, I consider myself blessed. I love my SUV.