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i have no heat in my 1994 Mercury Grand Marquis. what could cause the heat to stop working

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Q: You have no heat in your 1994 mercury grand marquis?
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Why does my heat work but ac don't on a mercury grand marquis?

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Where is the outside temperature sensor on a 2001 mercury grand marquis the outside temp gauge registers 127 degrees at all times. heat will work only if electronic temp control set at 90 degrees.?

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Why is there no heat for a 1994 mercury grand marquis?

It could be a couple of things, but check the easy things first. Check the anti freeze level with a anti freeze checker, if there us more water in the radiator than anti freeze the water will evaporate and the heater will blow cool. next check the thermostat, you have to take it out and heat it up in hot water and see if it opens up when it reaches the right temp when heated it will open up,those are usually the two most common problems.


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How is the headlight switch removed in a 1994 Mercury Grand Marquis?

If it is the "pull out" type there should be a button on the switch accessible under the dash that will release the knob (Lights will turn on). Pull knob off and you will be able to remove the bezel which will allow switch to be removed. It is suggested that connector be replaced at the same time. Heat generated be switch destroys contacts. The question you ask is too involved for a proper answer. You may want to go to a car parts store, or book store, and get a repair manual for your car. They cost about $16.00 Or, go to a Public Library. Headlight Switch Removal and Installation Ford Crown Victoria / Mercury Grand Marquis 1989-1998 from Autozone DIY http://www.autozone.com/az/cds/en_us/0900823d/80/17/3b/a8/0900823d80173ba8/repairInfoPages.htm


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Where On a 1994 grand am is the thermostat?

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