Engine Fan

1998 MERCURY MYSTIQUE
4 CYL • FWD • AUTOMATIC
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KELCIE
  • MEMBER
  • 2 POSTS
What causes the engine fan to run at high RPMs in a 1998 mercury mystique? The thermostat in the engine was bad but after i replaced it,i noticed that the engine fan was running constantly at a high rate, and it never shuts off. What could be the problem??
Nov 20, 2010 at 12:38 AM
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JACOBANDNICKOLAS
  • CERTIFIED EXPERT
  • 110,175 POSTS
Check the wiring to the temp sending unit to make sure nothing is shorted or damaged.

Let me know what you find.
Nov 20, 2010 at 12:41 AM
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RASMATAZ
  • CERTIFIED EXPERT
  • 75,992 POSTS
Could be the high speed coolant fan relay is sticking or the PCM controlled circuit of the relay- try removing fuse no. 2 60amp and see what happens-
Nov 20, 2010 at 12:47 AM
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