I am alost certain the fan should run, but I am beeing told repeatedly at the dealer that the fan on this vehicle does not run after shutting down the engine. I also distinctly remember the fan would go to high when I turned the AC on. It doesn't anymore and the deales says it doesn't "necessarily" have to turn on to high with the AC on. Just frustrated...
I don't know specifically about the Durango, but in most vehicles these days, the electric radiator fan shuts off when the key is turned off. It should be controlled by a thermostatic sensor which measures the coolant temperature. On twin fanned radiators, the 2nd fan often turns on with the a/c. Maybe the Durango has only 1 fan and the a/c bumps it up a notch, either from Off to On, or from low to high. I'd only worry about if the coolant was getting too hot with the a/c on.
It sounds like the overflow reservoir is overfilled or does not have enough capacity.
Have you tried replacing your radiator cap?
SOURCE: 2005 dodge durango, brake lights will not shut off
Check the brake light switch (aka stoplight switch) mounted high up on the brake pedal. Some have an adjustment, which hopefully is all that is wrong, it must be adjusted. Try pulling the brake pedal up, do the brake lights go off? If they do, then it needs to be adjusted.
SOURCE: engine overheat , no heat in vehicle
you may have a clog or your water pump is not working.
Testimonial: "yep, was a clog in the radiator. Flushed it out with hose , works fine now .. thanks "
SOURCE: my 99 dodge durango shut off on my wife. she said
Check your PCM a very common issue among Durangos See if there is any type of error code in the odometer. If 'no bus' is shown it is your PCM the main computer and your looking at about $500-$800 to replace it. to get it started try unhooking the battery cable for a few minutes and then hooking it back up
SOURCE: where is the PCM located on a 99 dodge durango?
The PCM is located on the fender well in the back of the engine compartment close to the firewall. It is a gray rectangle about 7" x 5". It is ribbed. It attaches using three screws.
It is also located close to heater core parts of your truck. If your overheating problem is related to the heater core, it may in fact be causing the PCM to everheat, though I've never heard of it happening before.
Testimonial: "thanks for the info.."
SOURCE: 99 dodge durango pcm and connectors heat up causing the vehicle..
it would be best if you took it to a dealer and left a mechanic take it home over night,that way he can have the Chrysler drb hooked up when the problem presents its self.
OVERHEATING
Physically look in the radiator under the cap(if one exsist's) when cool, for coolant level, and check the valve in the cap for sticking. If air is present in the radiator it can't get out, and more coolant can't get in,(from the overflow). Either clean the cap or replace it and check that it is the CORRECT cap.
If radiator is low on coolant fill it to overflowing, replace cap, and check that coolant overflow is filled to the COLD line or mark. The overflow is normally where you would add coolant. (never overfill the overflow)After refilling as outlined above, check the level every morning for 2 or 3 days until coolant level stops dropping below the cold mark and add coolant to the overflow ONLY. Do not open the radiator cap. Also, if you have even a tiny coolant leak anywhere in the system, air will get drawn in, instead of coolant from the overflow.
For more OVERHEATING PROBLEMS try these...
Radiator fins dirty, clean with a strong stream of water, not high pressure water.
Radiator clogged, try backflushing it, or replace.
Thermostat stuck open or shut, replace it. Or installed BACKWARDS.
Water pump worn out, can no longer move enough coolant, replace it.
Fan shroud broken or missing....
Electric Fan(s) not working, Check the fan, relay, fuse and engine temperature sensor's.
Belt driven fan, belt slipping, fan clutch is bad, fan blades have flattened out.
Air dam under front bumper is gone, loose, or broken. It actually has a purpose other than scraping on the driveway or curbs. It forces air up into and thru the condenser and radiator. If it's loose, airflow can actually push it out of place making it useless or blocking the airflow. Along with that, there may also be a plastic piece attached to the bottom of, and wraps up behind the bumper. If it's loose, airflow can actually push it out of place blocking the airflow. Simply reattach it with 4 or 5 screws.
Also, if the vehicle has A/C and electric fans, one fan is dedicated to the A/C and should come on almost the instant the A/C is turned on. The engine fan will run even with the key off, that is normal. The system is trying to cool itself. Hope this helps.
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