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It you are using the "de-ice" function, this might be the normal case ... warm dry air must be blown onto the windshield in order to remove the fog and dampness. With just the heater running it will push warm moist air to the same spot which would add more problems to the visibility issues.
What else can I help you with?
I cant get any heat in 95 grand marquis 4.6 engine thermostat change already?
Check for a heater control valve in the upper hose to the heater core, they stick all the time, then see if the air mix door is functioning properly on the heater itself.
Where can you find a 1999 grand marquis spark plug diagram?
Just replace them one at a time in the exact same order they are now.
How do you change 1999 Mercury Grand Marquis from Celsius to Fahrenheit?
The newer models can be changed by hitting "max ac" and "def" at the same time for a couple of seconds.
What can cause wipers on 1986 Grand Marquis to run any time key is on?
it is broken
How do you set the clock on your 2004 Mercury Grand Marquis?
Press and hold the clock button at the same time press seek either way to change the hour and tune disc to change the minute
What would cause a 1999 Jeep Grand Cherokee to have no ac to front?
if the rear ac is working then you probably have a damper door that is inoperative. this is in the heater/evaporator box. so if it isn't working then you will be heating and cooling at the same time out of the heater box.
What number brake fluid should be used with an 04 grand marquis?
According to the 2004 Mercury Grand Marquis Owner Guide : ( DOT 3 brake fluid , meeting Ford specification ESA-M6C25-A is recommended ) * if DOT 3 is not available , DOT 4 can be used ( I'm not a mechanic / technician but I don't believe that both types should be in the system at the same time )
How can you tell if your 1999 grand marquis jumped time?
You use a timing light to check the marks on the timing chain/belt.
Is there a problem with the fuse if the power windows go down one by one on a 1993 Mercury Grand Marquis?
That's how they work. One button for one window. They don't go down all at the same time.
Why does 1994 Grand Marquis front left wheel squeaks every time the suspension moves up and down?
No one cares!
2001 mercury grand marquis heater is not blowing air why?
we had the same problem with our 2001 Marquis. The service station said it needed a new computer part that he could order for over 200 dollars from a junk yard. Because we live in a cold climate, we opted to have it fixed. He could have connected the wires and then it would have run all the time, but we chose to have it fixed. We just got it back and the blower is working again, though we haven't got the final bill yet. However the left side of the heater/radio control lights are now out, and I'm not sure if it's because of the new part, or something else. Hope this helps.
Is there a heater that will also purify the air at the same time?
There is a heater called the EdenPURE Quartz Infrared Portable Heater that can heat your home and purify the air at the same time. It can heat up to 1000 sq feet of space at a given time. You can check out the company at www.edenpurestore.com.
