My problem of my jeep GC is the aircon run only on cold engine once i reach temperature of 105 the ac compressor is not run,i check the fuse,relay and switch all of this ok,i just put the temporary solution by installing separate relay to supply the battery to ac compressor but everytime the temperature of my engine is getting high i switch off the ac and let the temperature go down manually switch on the ac,i know this is abnormal can u please advice. thanks and waiting ur good advice.
Your question is a bit hard to follow but I think I understand it. First I believe you are saying that the engine temp gets high at 105f, I think you mean 205f..that is not too high actually but sounds as if the compressor is adding a load to your engine. You need to check the compressor out and it is not an easy task to do. But a simple test is. ENGINE IS NOT RUNNING!!..sorry just want to be clear, with the engine off and cool, the center part of the compressor operates from a clutch , try to turn it with your hand to see how hard it turns, not real fast you are just feeling the bearings at this point. If it is real hard to turn you should have that looked at but if it is not real hard you may have either a low oil charge or low freon condition in the ac system, local parts stores have a refill kit to check this out, get the one with the coloured guage on it, it will allow you to fill to the proper level. Boy I hope this helps you, ac probs are the worst to fix without seeing it. If your engine is getting real hot like the 220f region you might want to check your radiator fluid (coolant level and condition) as well as the thermostat, the 6 cyl uses one around 195f . I don't know the 8 cyl one buy you can check the temp of the hoses to see if the thermostat is working properly. good luck!
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Yes, that is normal operation for an engine. It needs to run at higher idle when cold and the computer does that through the temp sender. Make sure it's not excessive due to any vacuum leaks. This and the AC power loss would be exaggerated if the engine is not running correctly.
is it the ecotec engine fitted 1.8 or 2.0./2.2l or the diesel 1.7 engine.. how long have you not used the air con for. not using it for a long time you can damage the pump the flown sensor. even the temperature sensor. but if the engine is trying to stall with the ac on then the pump may have a fault. ac should be run for 10min once a week no matter the weather. stops you having problems later.
The cooling fan is made to come on when the engine reaches a certain temperature. To give a simple and general test - turn the AC on high - it your AC and fan are both working correctly the fan should come on almost immediately. If not within very few minutes like 5 or 8. Also at operating temperature the fan will run as well. In the early morning before you start the car open the hood - fill the radiator while the engine is still cold. start the engine and wait about 10 minutes or so. The fan should come on before the engine over heats. This may take up to 20 minutes and the fan is designed to run after the car is shut off IF - the temperature is hot enough.
All cars, the first priority of an engine is to reach operating temperature. That is, high idle, low gear, whatever it takes to do it, it does it. Once it reaches temp, it runs fine. I don't know how long it is taking your jeep to get there, But I would check radiator fluids, and other stuff, just to be sure. Hope this helps.
Heating problems are very frequent problem with G.C.
However, the root causes are not necessarely the sames.
First, do you run a 4.0 L or 4.7L
Second, is your vehicule equipped with dual zone air control (driver side and passenger side controlled independently)
Third, does you temperature gauge needle in your dash indicate very near to 100 degrees C or 195 degrees F when the engine reachs its normal operating temp.
Fourth, does it heat a little bit or nothing at all
Fifth, what is the average wheather temperature in your living country
Please provide these info and we will try to help you.
assuming fuse and relay are good..no fan should be running when the engine is cool/cold, the only time the fan should be running when it reach over operation temperature which then the fan kick on to bring the temperature back down to it operation temperature. both fan work in sync with one another, addition cooling is needed when the ac is running. when the last time have you replace thermostat and Thermos sensor/switch. I would replace both unit if you have not done so. The thermos/switch will turn the fan on when it reachcertaintemperature and cut off when it sense the temperature drop in the engine.
There are two fans behind the radiator. One is suppose to begin running
when the AC is turned on. The other is to cool the radiator when it
gets too warm. Raise the hood with the engine running and AC "on"and
see if at least one fan is running.
When the GC reaches a temp of 180 Deg. F the fan relay sends a signal to the fan to turn on, once the temp lowers (around 155 Deg. F) the relay turns off the fan, and so the cycle continues. If the relay is bad there will be no signal to the fan to run. While you are driving your vehicle there is ambient air moving thru the radiator, cooling the engine, but once you encounter slow/heavy traffic or stop there is no air moving and the temp goes up, the fan will not kick in and the vehicle will overheat.
If the fan motor is not working the same will happen, but a more expensive fix, as the motor comes with the fan.
If the Thermostat is stuck in the open position, the water travels to fast in the engine and heat exchanging is not an efficient process, therefore the vehicle might overheat when stopped or in slow traffic.
You say that the air con is not cold, i think the problem would be the aircon will need regasing, if the gas has escaped from the system, the temperature in the aircon system will always be warm so the fan will continue working attempting to cool it down. It will need checking for leaks, most companies that recharge the system check the whole system for leaks first before refilling the system. If its the engine cooling fan it could be the thermo switch that is faulty,the way to check that is when the engine is cold disconnect the wires from the switch and put an ohms meter across the swith it sould not give any reading, it will only show a reading when the engine reaches operating temparature. hope that helps. regards Richard