How is the heat in a Grand Marquis controlled?
With the engine at full operating temperature, locate the two heater hoses where they go into the firewall and feel them to see if they are both hot to the touch. If they are both hot, the heat in that vehicle is controlled by a blend door that regulates heated air flow. It is operated by an electric motor/actuator.
Why is my Grand Marquis blowing hot air?
If they are both hot, the heat in that vehicle is controlled by a blend door that regulates heated air flow. It is operated by an electric motor/actuator. The problem can be that the actuator is stripped or inoperative or the door itself could be damaged.
How can I tell if my Grand Marquis has a leak?
If there is a leak, what you described is what happens. Check under the dash for disconnected, damaged, dry rotted, vacuum hoses as well as under the hood. If you are lucky, you will hear a hissing sound from the leak with the engine running.
When did the Mercury Grand Marquis come out?
In this article, we consider the fourth-generation Mercury Grand Marquis, produced from 2003 to 2011.
What are common reasons my Mercury Grand Marquis has air conditioning problems?
What are common reasons my Mercury Grand Marquis has air conditioning problems? While there are a variety of reasons your Mercury Grand Marquis air conditioning won’t work, the most common 3 are a refrigerant leak, an electrical climate control issue, or a problem with the air conditioning compressor.
When does Mercury Grand Marquis climate control go on back order?
So when it quits you will always has a defroster, the heat and air are only a comfort issue. Nice huh. They are $650.00 and are on back order by 1069 until July 2010, at which time there is supposed to be more than two thousand available. Which tells me they should be put on a recall.
Is the self test on a Mercury Grand Marquis?
This shows how to trigger the self test on an Electronic Automatic Temperature Control (EATC) module in a Mercury Grand Marquis. This is a 1998 model but the same unit is used in many other cars (including other Panther platform cars like Ford Crown Victoria and Lincoln Town Car)
What’s the problem with my 2003 Grand Marquis?
I just finished fixing a 2003 Grand Marquis for air blowing out the defrost only. This is the goverment mandated failure mode. The problem is that the vacuum harness is leaking vacuum where it connects to the back of the conrol head. The vacuum harness connection ports relax after several years.
How to do the self test on a Grand Marquis?
To enter the self-test, press the OFF and FLOOR buttons simultaneously and then press the AUTOMATIC button within 2 seconds. The display will show a pulse tracer going around the center of the display window. The test may run as long as 30 seconds. Record all DTCs displayed.
Why is my Mercury Grand Marquis AC not working?
Learn if it’s a simple fix or time to seek out a trusted technician. Not your vehicle? Why Isn’t My A/C Working? What are common reasons my Mercury Grand Marquis has air conditioning problems?
If they are both hot, the heat in that vehicle is controlled by a blend door that regulates heated air flow. It is operated by an electric motor/actuator. The problem can be that the actuator is stripped or inoperative or the door itself could be damaged.
With the engine at full operating temperature, locate the two heater hoses where they go into the firewall and feel them to see if they are both hot to the touch. If they are both hot, the heat in that vehicle is controlled by a blend door that regulates heated air flow. It is operated by an electric motor/actuator.
If there is a leak, what you described is what happens. Check under the dash for disconnected, damaged, dry rotted, vacuum hoses as well as under the hood. If you are lucky, you will hear a hissing sound from the leak with the engine running.
Why is my Mercury Grand Marquis not blowing air?
This 2009 Mercury Grand Marquis came in with the complaint the air conditioner would only blow air through the defroster vents. Rarely would air come out of the face vents. This is a common problem and can be expensive to repair. A work around, of sorts, is to manually drop the blower speed to the lowest speed setting.
To enter the self-test, press the OFF and FLOOR buttons simultaneously and then press the AUTOMATIC button within 2 seconds. The display will show a pulse tracer going around the center of the display window. The test may run as long as 30 seconds. Record all DTCs displayed.
What was the a / C temperature on a 2008 Mercury Grand Marquis?
This 2008 Mercury Grand Marquis came in with the complaint that the a/c temperature was stuck on full heat. The complaint could have easily been reversed with no heat present and the system stuck on full cold. It has Automatic Temperature Control (ATC).
When did the Mercury Grand Marquis become a standalone model?
Mercury Grand Marquis. From 1975 to 1982, it was the premium model of the Mercury Marquis model line, becoming a standalone model line in 1983. For its entire production run, the Grand Marquis served as the flagship of the Mercury line, with the Ford (LTD) Crown Victoria serving as its Ford counterpart.
How does the climate test work on a Mercury Grand Marquis?
Trigger the test by setting ignition to ON, turning climate control device OFF, pressing FLOOR + OFF, then pressing AUTOMATIC within 2 seconds. 888 code means all tests passed. Codes 24 and 25 are common errors for blower motor issues.
How does the heater work on a Mercury Grand Marquis?
Control the temperature of the cabin air: The heater and air conditioning controls for the Mercury control the temperature of the cabin air. They connect with the engines radiator, thermostat, and air conditioner compressor for measuring the temperature of the cabin.
Where are the climate controls on a Mercury Grand Marquis?
Select the placement of the heating or air conditioning control part: Select an entire interior climate control unit faceplate or an individual knob or switch that fits onto the dashboard. There are also products that fit behind the dashboard panel trim of the Mercury Grand Marquis LS.
When did the Mercury Grand Marquis become stand alone?
The Grand Marquis was the premium trim level of the Marquis product line and then became a stand-alone model in 1983. After driving your Mercury sedan for many years, the controllers for the heating, ventilation, or air conditioner may need to be replaced so that you can maintain climate control and interior comfort of the vehicle.
What do you need to know about the Mercury Grand Marquis?
Control Arm, Tie Rod Adjusting Sleeve, Sway Bar Link, Pitman Arm,… Control Arm, Sway Bar Link, Pitman Arm, Tie Rod End, Idler Arm and… Control Arm with Ball Joint Assembly, Front Upper Passenger… Control Arm with Ball Joint Assembly, Front Upper Driver Side… What’s not to love about your Mercury Grand Marquis?
What to do if you blow a fuse on a Mercury Grand Marquis?
Check the appropriate fuses before replacing any electrical components. A blown fuse can be identified by a break in the wire within the fuse. Before replacing a fuse check that the key has been removed from the ignition and that all the services are switched off and/or disengaged. Always disconnect the battery before servicing high current fuses.
Why is my Mercury Grand Marquis overheating?
The good news is that here at CarParts.com, you can find the parts you need to restore your daily driver without any hassle! Many drivers have reported an overheating engine due to a cracked intake manifold. This is because the manifold is made from plastic, which may break under extreme temperatures and cause engine coolant leaks.
Where is the vacuum harness on a Mercury Grand Marquis?
Feed a tie strap around this part so it clamps the vacuum harness to the control head. I put one tie strap on either side of the black vacuum supply hose in the center of the harness. Operate the controls to be sure it is fixed. If you wish, you can disconnect the vacuum harness under the dash for easier working room.