1999 Mercury Mystique Logo
Posted on Jan 03, 2012

1999 mercury mystique fan blower

My full blasting power for defroster, AC, heater does not work. Is it a fuse that I can replace or something else

1 Answer

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  • Contributor 24 Answers
  • Posted on Feb 19, 2012
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Joined: Dec 30, 2010
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So, it works on all settings except for full power?Sounds like the switch in the climate control unit itself.

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Anonymous

  • 150 Answers
  • Posted on Nov 04, 2008

SOURCE: blower not working on ac or heater etc.

A very common solution here is replacement of the blower motor resistor. The resistor when they break do one of two things.

A. work only on high

B. dont work.

This item is located on passanger side under dash and is usually held in with two small bolts on either side with an electrical connector seperating the mounting screws. It is mounted right in the air box. I replace at least one of these a week in my shop very common item.

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Anonymous

  • 360 Answers
  • Posted on Oct 09, 2008

SOURCE: 1996 mercury grand marquis gs dash blower switch

heres the electrical diag.....58909880

Anonymous

  • 783 Answers
  • Posted on Feb 12, 2009

SOURCE: Mercury Cougar heater blower only works on high.

remove the trim panel below the glove box and you will see the blower motor,just to the left of it you will see a 4 wire connector plugged into the case. This is the blower motor resistor,this is what you need to replace.

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Marvin

  • 85242 Answers
  • Posted on Jun 26, 2009

SOURCE: Air conditioner fan dos not come on when turned on

replace the fan speed resistor, the thermal limiter is open.

Patrick Rayome

  • 1757 Answers
  • Posted on Feb 19, 2010

SOURCE: Blower speed question (ac/heater). This just

This is definitely 100% the Blower Motor Resistor.
Replace this and all speeds will work fine.
This Resistor is defined with 3 to 4 wires going into it, and is located adjacent to the Blower Motor.
It is easily access, removed and replaced.
I will post an additional comment on Part Number, Price and where available.
Let me know if this helped, or if you have additional information or questions. Feel free to contact me at FixYa.com!

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Blower motor stays on when car is off 1999 mercury mystique

The Mercury Mystique had somewhat of a bad reputation for wiring problems. I guess my question to you is have you had to have the wiring worked on?? If so, I'd guess that it would be pretty possible for a wire to be hooked up wrong at the ignition switch if somebody has been fooling with that. Just a thought... Also, I'm wondering if the fan continues to run until your battery goes dead?? Now, I'm hoping you don't have the blower motor (for the heater and air conditioner) confused with the electric engine cooling fan. It is normal for the engine fan to run for a while after you shut your engine off. But, I'm probably telling you things you already know along that line.
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Is the resistor getting power from the relay ?
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Heater fan on 1997 Mercury Mystique only works on "high" after replacing blown fuse.

You will need to replace your speed sensor switch located beside blower motor 2inch by 1inch single plug if you had a replacement in hand you could better identify it.
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Air/heat blower is not working unless it is on high.

The heater resistor is probably faulty, its located near the blower fan
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When you try to turn the heater on or a/c the heater dont turn on and the ac dont turn on.

More than likly a fuse is blown. The problem isn't the blown fuse but the cause of the fuse getting blown. The blower motors seise and lock up then the fuse blows the blower can get something in it mouse pen dropped thoght defroster. The ballast resiter burns out and then it don;t blow the fuse, Rarely the switch gets unpluged or burnt out but not a common problem. Fuse is 30 amp green.
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Blower motor, heater fan, radiator fan not working im not sure what the problem is. there is no power getting to these parts

Blower motor problem may resistor,have seen resistor and connector burnt. Resistor is located under dash on right side on heater case, check for damage.Radiator fan has 2 relays,high and low and also has a resistor,I would start with these items. Make sure fuses are ok.
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Air conditioner fan dos not come on when turned on

replace the fan speed resistor, the thermal limiter is open.
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