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When the air conditioner in your 2009 Mercury Mariner starts blowing hot air, you likely have a freon leak. Recharging the freon in your AC system is an inexpensive and easy first step to restoring the cooling capacity of your A/C system. Most refrigerants include a leak sealer that will seal small leaks in addition to filling the R134a refrigerant. The A/C system in your Mariner consists of a compressor that is belt-driven, an evaporator and freon. If there is a problem with your compressor or evaporator, adding freon will not restore cooling. How to add freon to your 2009 Mercury Mariner: hook up the can of refrigerant (likely r-134a) to the low pressure port. When your compressor kicks on, add freon to the correct pressure. In addition to cooling, freon lubricates the compressor when it runs.
Learn where your air filter is located and how to determine if it needs to be changed.2009 Mercury Mariner 2.5L 4 Cyl.
Harsh downshifts? Slipping gears? You might be low on transmission fluid2009 Mercury Mariner 2.5L 4 Cyl.
Leaking coolant is usually a sign that your water pump needs to be replaced. This video shows you how to quickly plug it2009 Mercury Mariner 2.5L 4 Cyl.
White light when you back up - yup, they burn out and you can replace them with bright LEDs2009 Mercury Mariner 2.5L 4 Cyl.
Cars burn, leak and otherwise dispense of their oil. Check your level frequently and top up when necessary2009 Mercury Mariner 2.5L 4 Cyl.
Don't send mixed signals - if your turn signal doesn't blink, or blinks rapidly, you likely have a burnt out bulb2009 Mercury Mariner 2.5L 4 Cyl.