95 Mercury Overheating

1995 MERCURY SABLE
105,000 MILES
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AUTOMAN2000
  • MEMBER
  • 5 POSTS
95 Mercury Sable 3.8 overheating: In hot weather my Sable temp guage rises to the mid-way point when running the AC. The car stumbles and the engine quits. After I let it cool off and drive it again with the heater on full blast, and not stopping, the car runs without quitting.
It's got a new radiator and anti-freeze fluid, a fairly new thermostat and water pump. Although I don't see any leaks, from time to time I have to add fluid. Could it be the Constant Control Relay Module for the fan, or, the Engine Coolant Temperature Sensor? Maybe it needs a new radiator cap? What do your suggest I check? Thanks!
Sep 11, 2011 at 6:16 PM
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PROMECHANIC
  • CAR REPAIR CONTRIBUTOR
  • 536 POSTS
You need to check to see if the fans are on full blast when the car is getting hot.
If they are not then you have a problem with the fan circuit. Things that commonly cause this are cooling fan relay, and temperature sensor. It could also be a bad fan or ECM too.
Sep 11, 2011 at 6:52 PM
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