Radiator cooling fans run constantly with engine running

Asked by Dec 27, 2009 at 12:01 AM about the 2000 Dodge Intrepid Base

Question type: Maintenance & Repair

Both fans run at high speed constantly when the engine is running - even with the A/C off. No problem codes stored and the MIL is off.

If I disconnect the A/C pressure transducer the fans stop and cut in at low speed when the engine coolant temperature reaches 216 degress.

I swapped out the A/C pressure transducer with a known good one from one of my other intrepids but no change. High-side Pressure in A/C system is 100 psi with A/C off.

With the ignition on and engine not running, at the A/C pressure sensor harness connector, the supply voltage is 5.1 volts and the A/C pressure signal is 4.7 volts. The resistance in the ground wire to the PCM is 1.4 ohms so no problem there.

Anyone experienced this problem before or have any ideas what the cause might be?

2 Answers


I have the same problem with my 07 caravan....., were you able to sovle it..., and if so, what was the cause? thanks chuck

8 of 8 people found this helpful.

I had the same problem in a 2001 and it was cause the thermostat was stuck open. Since around the 2000 model year cars have come with failsafe thermostats. So when they stick, they stick wide open. This throws the vehicles computer into what is termed "hyper cool" and runs everything wide open to protect the engine as much as possible.

2 of 2 people found this helpful.

Your Answer

Dodge Intrepid Experts

  • #1
    Michael Kane
  • #2
  • #3
View All

Related Models For Sale

Used Dodge Stratus
710 listings starting at $2,995
Used Chevrolet Impala
516 Great Deals out of 33,770 listings starting at $950
Used Dodge Avenger
147 Great Deals out of 4,477 listings starting at $1,500
Used Dodge Ram 1500
392 Great Deals out of 10,914 listings starting at $1,500
Used Ford Explorer
833 Great Deals out of 63,128 listings starting at $1,000
Used Ford F-150
2,317 Great Deals out of 182,094 listings starting at $1,000
Used Chrysler 300M
215 listings starting at $2,950
Used Jeep Grand Cherokee
906 Great Deals out of 70,389 listings starting at $1,045
Used Dodge Neon
608 listings starting at $2,995

Used Cars For Sale

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use.