If you have the climate control heat/AC with the Auto setting your fan is a variable speed unit that has solid state controller. Very common for this controller to go out. The unit is mounted under the hood about 12 inches to the right of the fan motor. directly back from the right side valve cover. The unit ia about 4X2" with a connector on the right side. This unit can only be purchase at your dealer. difficult to change but it fixed my problem.
low on freon compressor kicking in and out
A bad starter can cause a Mercury Grand Marquis to not start. A bad alternator or a problem with the security system can be the cause for the car not starting.
I have a 1998 ford grand Marquis- and the problem is the air suspension light stays on- how to fix this problem
When there is a problem in the vent system it defaults to defrost setting. Check the doors & vac supply
air is blowing bat problem is no air com to front only in class
If it is a Grand Marquis or any other V8 RWD Mercury, it shouldn't be a problem as long as they are of similar vintage
Have vehicle scanned to determine the problem
If a 1988 Mercury Grand Marquis shifting out of second gear gets choppy after acceleration then the overdrive band may need servicing. An overdrive band that is sticking can also cause this problem.
that usually indicates a vacuum leak which causes the system to go into default mode, which is defrost.
Have to first remove all the light bulbs, then put in a fresh fuse, if it still blows, then you will have to follow all the wires to find the short. If the fuse does not blow, then the problem is with either the bulb or the socket.
If the temperature cannot be changed for any of the direction settings, e.g., defrost, vents, floor, then the problem is very likely to be the blend door actuator motor.See "Related Questions" below for more
Burned out bulb?
either the fuse that was put has too much wattage or not enough
i have a 2002 grand marquis and when i driving on the highway at speed of 60 to 70 the light of traction control star to flash way is the problem
Auto Climate control? If so it is a self-diagnosisng component- you will have to get codes and sequence from library or dealer--normally a blend door problem If not auto climate--check temperature control cable to see if bound or broken
If this is the condenser that is frozen, you have a problem with the defrost cycle. There are 2 things that need to be checked, the defrost sensor and the defrost control board. More than likely it is the defrost control board that is the problem and of course that is the more costly of the 2.
if it is blinking steadily without your input , button on the end of the gear shifter, then you have an internal transmission problem, or a pcm problem. Neither of which are cheap to fix.
I had the same problem coming from Detroit to Atlanta Lucky My Father in law was with me. He had had the same problem he just disconnected the sensor going to the air filter box and have had no problem since
If you can Not change the location of the air flow to the different outlets (defrost, dash, floor, etc) That sounds like a mode door problem or a mode door control knob.
I experienced a problem with a 84 Grand Marquis that would stall at stops. Found that the ignition switch in the steering column had separated that caused the stalling problem. Replaced the ignition switch that solved the problem.
You can disconnect the battery and wait 5 minutes, but if you haven't fixed the problem, the light will come back on, if not immediately, sometime soon after.
I own a 1994 acura integra and the heater/air conditioning blower is not working, I can not defrost my windows and the heat does not blow. What is wrong and how can the problem be fixed.
the failure is with the "blend door" very expensive unless you are mechanical.
You need to check the vacuum lines for the a/c system for leaks, breaks and loose ones first.......
I had the same problem... I had to replace the battery in my remote at the dealer... hope this helps