Asked by Jerard May 19, 2017 at 11:09 PM about the 2003 Mercury Grand Marquis LS Premium
Question type: Maintenance & Repair
I have a 2003 Mercury Grand Marquis. My defrost and floor
vents work, but the middles vents doesn't blow anything.
Also my vehicle gets cold but it seems as if the cold air
escapes. I have electrical controls no knobs. Any
suggestions to the problem?
Some electrical testing may need to be done, the HVAC control module or the HVAC blend door actuator could be bad, or there is a problem with the blend door itself. This just has to be looked at to determine the problem. As far as heat, either the thermostat needs replacing, or there is a problem with the HVAC Heater Control Valve in the heater hose.
Fixed same issue on my '03 Marquis with new 007 size O rings for little valves in dash mounted Climate Control push button panel. Easy DIY job. Videos on YouTube how to. $5 in parts. Dealer will tell you the whole unit must be replaced to the tune of $$$$$ bucks. Do it yourself for around $5 in O rings.
I have a 2003 Mercury Grand Marquis. My defrost and floor vents work, but the middles vents doesn't blow anything. Also my vehicle gets cold but it seems as if the cold air escapes. I have electric...
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