Mercury preventive maintenance repair questions and answers
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208 Questions
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Air conditioing on my car stopped blowing cool airiceman1966 - 2002 Mercury Grand Marquis - Preventive Maintenance - 6/14/2010the compressor works,needs no freon and the black thing in there is cold bot the air is not coming out of the dash,only warm air. it made a funny knocking noise in the dash before it stopped working. i would really appreciate the advice-
6/14/2010 ANAYVsome cars have a 'blend door' .separates the warm air,from the cool air,or mixes them. -
6/14/2010 HouseCallAutoAnayu is right. Your Merc needs a blend door actuator. It is stuck / failed in the heat position.
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Why does air not flow throught the front air vent inside my car.James - 2003 Mercury Grand Marquis - Preventive Maintenance - 6/11/2010The defrost and floor vents work, but the front vents don't blow.-
6/11/2010 HouseCallAutoMost times the fix is to replace the EATC control head which is the controls that you input settings on the dash. Here is a detailed diag procedure if you are up to this sort of thing.>>
1. Verify manifold vacuum is present to the HVAC controls on the black vacuum line, and, that when the engine is shut off vacuum will hold in the vacuum line.
2. If vacuum bleeds off when the engine is shut off, inspect the vacuum line to the vacuum tree and to the vacuum reservoir.
3. If manifold vacuum is good to the HVAC control assembly, check the other individual vacuum lines with a hand-held vacuum pump to verify there is no excessive bleed-off indicating a related vacuum line or vacuum actuator problem.
The white vacuum line feeds the fresh air inlet door controlling the use of fresh air vs. recirculation air from inside the passenger compartment.
The red vacuum line feeds the defrost/floor vacuum motor. This actuator is sent a vacuum signal in every position except Defrost and Defrost/Floor.
The yellow vacuum line also feeds the defrost/floor vacuum motor. This vacuum line sends the actuator a vacuum signal in all positions except defrost.
The blue vacuum line feeds the panel door vacuum motor. This vacuum line sends the actuator a signal in the MAX A/C, NORM A/C or VENT positions.
4. If the black vacuum line is feeding the control assembly a proper vacuum signal and the actuators are pulling and holding a vacuum signal using the hand-held pump, the HVAC control assembly is failing.
Potential Causes: Heater Ventilation Air Conditioner (HVAC) Actuator
HVAC Control Assembly
Vacuum Line
Vacuum Lines Connections
Defective Vacuum Tank
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Headlights not coming onwilliam nowell - 2005 Mercury Grand Marquis - Preventive Maintenance - 5/31/2010headlights come on when they want to ,windsheild wipers dont come on at all ,bought motor for wipers bought headlight swich sitll dont work-
5/31/2010 sbrad22Check the fuse for the wipers in the fuse box.Check your relay switch in fuse box for headlights.The relays are the big square things in your fuse box.
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When running A/C scan getting codes 051 and 053, what do these codes indicate?Twhitney - 2002 Mercury Sable - Preventive Maintenance - 5/29/2010-
5/29/2010 HouseCallAutoCheck the sunload sensor circuit. Test the sensor resistance between pin 1 and 5. Should have continuity.
1. Disconnect the Sunload sensor 6 cavity connector. The sensor is located above the glove box on the dash. Measure continuity between the sensor terminal 1 (Brown wire will connect to it) and terminal 5 (Black/Yellow will connect to it).
2. The sensor should show continuity. The value will change based on the intensity of light applied to it. If the sensor reads open, replace the sensor, clear codes and retest for proper operation.
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Do you have to twist the headlight bulb to replace it or are there screws that must be removed?hova - 1985 Mercury Topaz - Preventive Maintenance - 5/23/2010-
5/23/2010 HouseCallAutoUsually a plastic ring turns counterclockwise just a bit and then the bulb pulls straight out with the wire attached.
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Step by step on how to replace fuel filterlaura - 2006 Mercury Mountaineer - Preventive Maintenance - 5/23/2010-
5/23/2010 HouseCallAutoWe do not have the step by step procedure to copy and paste here. That information will have to come from the appropriate repair manual for your make and model.
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I hear a sound coming from the right front wheelKevin - 2002 Mercury Mountaineer - Preventive Maintenance - 5/23/2010I jacked the car up and there was no play at all when I had my hands at the 12 and 6 oclock positions. I could not rotate at that time however, we did replace the left front hub assembly a while back. The noise there was more than what I hear now but I was ... -
Coolant light keeps coming on but raditor and reserve is full of coolantgravy300 - 2000 Mercury Sable - Preventive Maintenance - 5/20/2010 -
I am having problems with my rest controldino arias - 1999 Mercury Grand Marquis - Preventive Maintenance - 5/15/2010 -
Turn signals and emergency flashers quit..fuse OK..worked..then stopped..worked..stopped..now stopped for several days.Haroldw - 1997 Mercury Mountaineer - Preventive Maintenance - 5/10/2010-
5/10/2010 Bobbyprobably need to replace the flasher
it should be in the fuse panel will look more like a reelay big square or round
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A loud intermittent humming sound - seems to come from fan area.Val - 2001 Mercury Cougar - Preventive Maintenance - 5/8/2010The sound happens when I take my foot off the gas, or intermittently while sitting at an idle. As soon as I press the gas pedal it goes away. It's a sound that goes up and down, sounds kind of like an loud low-pitch kind of hum or echo. Someone looked at it and ...-
5/8/2010 MikeSounds like it could be the fan from your description. Can you disconnect the fan and see if the noise goes away?
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Odometer not workingcougardenny - 1991 Mercury Cougar - Preventive Maintenance - 4/2/2010How to repair a broken odometer? My speedometer is working fine, but odometer is not working. What is the problem?-
4/1/2010 Cory M.Sounds like something is wrong with the circuit board behind the instrument cluster (Speedometer). You can replace the circuit board, but with all honestly, I would just get a used or new instrument cluster, from a junk yard or Ebay. -
4/2/2010 cougardennyI bought an instrument cluster from a local junk yard. First, I replace the circuit board, but it didn't work; therefore, I put the old circuit board back in and replace the speedometer unit, and it works. Thanks
4/3/2010 Cory M.No problem. Glad it worked out.
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No gas leaks but still every now an then i get a strong smell of gas from the trunk,some one said maybe filler tube?whitebear - 1996 Mercury Grand Marquis - Preventive Maintenance - 3/19/2010any one have an idear of what to do? ty and if it is the filler tube is it hard to fix or change? ty again-
3/19/2010 HouseCallAutoI suspect that you have a small fuel leak from a rotted fuel line on the left side frame rail toward the rear of the car just in front of the left rear tire. Sometimes the line is rotted so bad it is porous and seeping fuel slowly but yet does not drip.
Kevin - HouseCall Auto Mechanics
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