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

Add photo

Related Questions

Search Dodge Intrepid Questions

Dodge Intrepid Experts

#1 Michael Kane
Michael Kane
Reputation 1,240
Reputation 460
#3 dandyoun
Reputation 360
View All

Related Models For Sale

Used Chevrolet Impala
553 Great Deals out of 35,458 listings starting at $899
Used Dodge Stratus
830 listings
Used Ford Taurus
272 Great Deals out of 18,688 listings starting at $1,499
Used Honda Civic
844 Great Deals out of 83,684 listings starting at $1,200
Used Chevrolet Malibu
1,119 Great Deals out of 80,273 listings starting at $2,500
Used Pontiac Grand Prix
25 Great Deals out of 2,829 listings starting at $1,850
Used Nissan Altima
1,301 Great Deals out of 74,561 listings starting at $1,000
Used Dodge Durango
273 Great Deals out of 20,982 listings starting at $1,500
Used Chrysler Sebring
32 Great Deals out of 2,818 listings starting at $1,200
Used Toyota Camry
1,207 Great Deals out of 82,541 listings starting at $750
Used Dodge Avenger
111 Great Deals out of 4,710 listings starting at $1,699

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.