Mercury Mariner Hybrid Repair and Maintenance
A guide to problems, costs, maintenance and repair for your Mercury Mariner Hybrid
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Mercury Mariner Hybrid ProblemsA/C Fan Speed Changing Constantly
The Mercury Mariner Hybrid equipped with automatic temperature control may have a problem with frequent fan speed changes when using the heater or air conditioner. Normally, the fan speed changes only to maintain a selected temperature, but when the fan speed changes frequently and needlessly, there is an issue with the fan speed control unit.
The fan speed control unit, sometimes erroneously called the blower motor resister, regulates the speed for the blower motor in order to maintain the temperature set by the driver. When it fails, the fan will run at random settings, and the climate control will be inaccurate.
Note: this does not affect the temperature of the air that comes from the vents, it affects the amount of air that comes from the vents.
The repair is simple, and quick. The control unit is located behind the glove box in most models, and removal and installation takes only minutes.
Also note: this only applies to vehicles with single or dual automatic climate control.
The 2008-2011 Mercury Mariner Hybrid with manual temperature and fan controls may have problems with the the blower motor only blowing air on certain settings. Most commonly the fan will only run on the highest setting. This is a well documented problem, and is caused by a failing blower motor resistor.
Correcting the problem is straight forward, and requires replacement of the small resistor. The resistor is normally found behind the glove box, next to the blower motor.
Mercury Mariner Hybrid QuestionsWhy is mariner hybrid all over the road in rain/snow after an accident i had? (2 answers)
Why is my 07 mariner hybrid all over the road in rain/snow after an accident i had? I hit a guard rail a few weeks ago and had to change passenger side front tire, wheel, strutt, and tie-rod. It was a little loose afterwards (may have slightly bent a-frame) but nothing too drastic. Today when it...
Sounds like chirping or tapping under the hood. It continues even after I turn off the engine and only stops when i open the door.
This has never happened before.