While there are a variety of reasons your mercury grand marquis is overheating the most common 3 are a coolant leak water pump radiator hose etc the radiator fan or a failed thermostat.
Grand marquis radiator fan not working.
I drove home a few blocks and forgot until the next day when it didn t the same thing.
Mercury grand marquis heater not working.
Diagnosis a word of caution.
If there is no coolant in your overflow you can refill it by adding more to the overflow reservoir.
Ive replaced 2 cooling fan motors with shroud and relay engine coolant temp sensor ive checked and replaced the fuses raidiator and thermostat.
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Your mercury grand marquis s radiator fan has one of the most important jobs on the vehicle it is the last line of defense between you and an overheating engine.
Just because the radiator fan is not on does not mean that it is not working.
If the radiator fan is not working it s a serious problem.
41 of the time it s.
99 mercury grand marquis ls cooling fan isn t working 3 answers.
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Mercury grand marquis heater is not working repair symptoms blower motor replacement when the blower motor fails the air conditioner and heater may still work and heat or cool may be felt at the vents but the air pressure will be dramatically decreased.
One night i started my 99 mercury grand marquis and the idle was very high and wouldn t kick down.
Why wont the radiator fan run on my 2006 mercury grand marquis 5 answers i have changed the thermostat and the cylinder temperature sensor and the car still runs hot and the radiator fan does not come on.
There is almost never a situation where you would need to take the radiator cap off of the radiator to add coolant.