Radiator fan not working

OK, you have addressed the first possibility. There are a few more, each progressively more expensive to fix. First, are the radiator electric cooling fans operating? If you find the vehicle runs ok on the highway, but overheats around town in stop-and-go traffic, it could be that the fans are not running. Quick check for the fans - with the ignition on (the engine doesn't need to be running), move the cooling control to the A/C position. If the fans come on, they are good, but you could still have a fan-related cooling problem. If the fans don't work, you have a problem. If the fans worked, the car runs fine at highway speed but not in town, then suspect the coolant sensor that engages the fans. If the fans work and the car overheats in all conditions, then a system blockage is possible. Blockages occur usually one of two ways: Radiator rust/corrosion, and collapsed radiator hoses. Radiator corrosion will require radiator replacement; if it is blocked badly enough to overheat, flushing it is a waste of effort, and could cause more problems with all the **** you circulate into the engine. If the system is low on water (air in system) it can rise to the top radiator hose and cause it to collapse partially or fully, restricting flow. Some engines have water jackets that extend higher than the radiator cap, so they can trap air. These cars have bleeder ports at these locations to remove to trapped air. Check to see if that is the problem.

No this wont cause an overheat problem. Check the coolant level , check to see if the fans come on after it heats up. when the car is warming up you can check the thermostat, by touching the top radiator hose, after a few minutes the hose should get hot, this indicates that the thermostat opened up and is working. If it doesn't replace the thermostat. If it doesn't over heat until you start driving , then suspect the water pump. The impellers can slip on the shaft and not have enough flow to keep it cool.

the reason that it doesn't overheat when driving is because there is enough air going through the radiator to keep the engine cool, when idling there is no air going through the radiator until the fans are activated ,when this occurs both fans should be working, you have a problem with the one that isn't working,it may be faulty or a loose or disconnected wire could be the problem......hope this helps......cheers.

Although the 4 cylinder is too underpowered to have air conditioning in my opinion, it still shouldn't overheat within 10 minutes unless something is wrong. If your Jeep doesn' not overheat when you are driving WITHOUT AC on then your compressor might have a problem and causing the engine to work too hard to turn it.

But if it overheats without the AC on, then the first thing you need to do is check the cooling fan and see if it operates! There has been a lot of problems with the cooling fan relay on this model. If that isn't it, then move to changing the thermostat and checking the water pump.

With the vehicle cool, remove the radiator cap, and manually pump the lower radiator hose until all the air is out of the system. That is how you get the air out of the system. If it is still overheating from there then you should check the fan to make sure that it is working correctly.

Do you know for sure if the radiator fan comes on? It should be coming on for the a/c, and it should come on BEFORE the engine temp gauge begins to climb.

Also, do you have obstructions in front of the grill? I would think that you said no blockage to the air intake, but also I could think if you have a winch. Is there any chance you have mud/debris in the radiator fins?

Bugs would be in the a/c condenser. Have you looked at the engine radiator behind the condenser? It's kind of hard to see. You may have to remove the plastic cover.

Make sure the fan goes from low to high speed; when the jeep starts to get warmer the fan should go from the normal low speed up to high (you usually will know it because it really is humming out there on high). It may just be hot enough that low speed can't handle the heat load of the air-cond and the engine in traffic.

The air cond gets the air before the radiator so if the fan is coming on low it will keep the condenser cool enough to have decent A/C performance... the dealer should also be able to test low / hi radiator fan operation.

Tell us news, hope helps.

At idling speed an engine does build up a lot of heat and the cooling fan will kick in. In slow moving traffic or traffic jams the temperature gauge can touch the red - particularly on hot days. The reason it cools down when you start moving is because of the air flow through the radiator.

Presumably there are no leaks from the cooling system otherwise you would have mentioned it. In normal circumstances the fan will not be running as you are driving at speed, as the air-flow through the radiator is sufficient to cool things. The fan only kicks in to get rid of excess heat - and this usually occurs at idling speed or after you have parked the car.

If the fan is running all the time as you drive, this points to either a fault in the fan switch, or the car is running too hot. presumably in normal driving the fan isn't running and the temperature gauge reads normal?

It is common - in stationary traffic many cars overheat (particularly big engined models) try to stall and 'cut out'. Restarting can be difficult until the engine cools down.

Is your car overheating in normal driving conditions or just at idle speed? Overheating in normal driving conditions can be caused by things like a failing water pump, blocked radiator, collapsed hose, faulty thermostat or, in the worst case scenario, cylinder head problems.

Overheating at idling speed is 'common'. Check your coolant level. If your car isn't using/losing coolant then there probably is no major problem. You can flush out the cooling system and refill with new coolant - and also check your radiator. Are the cooling fins crumbling with age? Or maybe they're partly clogged with insects and debris from the road? A blast with a hosepipe wil sort that out ..

The question is how much does your car overheat in normal driving? If it doesn't .. it appears as though you have nothing to worry about as such. Most cars have 2 speed fans... the 2nd faster stage kicks in at some point dependant on engine temperature. Perfectly normal.

I would guess that you are having a circulation problem but telling you why will require testing. It would be related to the hoses, the radiator, electric fan, or the water-pump. If the engine has been neglected then it could have to do with the antifreeze or maybe a clog inside the engine.

Check the coolant temperature with the car stopped. At idle with the hood up keep the thermometer in the coolant. Confirm if the coolant is not overheating but the engine is!!

Run the A/C keeping the thermometer in the coolant and allow the fan to kick on.

If with the A/C on the engine doesn't overheat then it confirms that the low speed on the fan motor is not working. Read the description of the Taurus where the low speed is used for normal operation when temperature is required but the high speed is activated when the A/C is on. The circuit is simple.

In your case the low speed has to be activated for the A/C to go into the high speed. The fact that the high speed is working and low speed is not indicates the low speed of the fan is defective.

Other problems such as the thermostat or plugged cooling system(radiator clogged) could be the root problem!

Hope this helps?

Take a look through your front grill and see if there is alot of bugs,dirt,etc. blocking the cooling fins of the condensor and radiator. If so try rinsing them with a water hose, or air pressure. Some cleaners work well also,like " Simple Green " or gunk degreaser. Catch the fluid in a container and dispose of properly.