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Re: my temp goes up when my car is idle and the ac on
If the temperature goes up when the ac is on, then there may be a problem with the circulation of coolant throughout the system. You said you changed the thermostat which is good. But, did you backflush the engine's cooling system so that maximum flow can be achieved?
On the other hand, the heat that comes off of the condenser can cause the radiator to cool less efficiently on hot days.
Does the fan immediately go on when the a/c is turned on? or is it the older style fan belt driven fan? Even, so, if it's an older style fan, the clutch sometimes go bad in them so that the fan doesn't spin as efficiently as it should.
Also, did you use 50/50 Antifreeze to water ratio coolant mixture?
If you use pure Antifreeze 100% concentration, then it can cause an overheat condition, because the fluid at this concentration doesn't transfer heat as well as a 50/50 solution of antifreeze to water.
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You probably need to bleed the cooling system properly.
Open the cooling system bleeder screws.
Slowly fill the cooling system with a 50/50 coolant mixture until coolant runs freely out of bleeder screws. Close the cooling system bleeder screws Install the coolant pressure cap Start the engine. Run the engine at 2,000 - 2,500 RPM until the engine reaches normal operating temperature. (midway on gauge) Allow the engine to idle for 3 minutes. Shut the engine off. Allow the engine to completely cool. Top off the coolant as necessary.
Run engine again at 2000 - 2500 RPM until the engine reaches normal operating temperature.
Allow engine to idle until cooling fans come on. It should come on with the gauge about 3/4 of the way to red. - if it gets to where is touches the red, shut down immediately.
When the fan comes on, put your hand behind the fan and observe the temperature of the air coming from the fan. It should feel hot. If it is blowing cold air, the coolant is not circulating through the radiator like it should. This could be caused by lots of things including an improper/defective thermostat, corroded water pump impeller, or a blown head gasket.
hi you might need your AC recharging, after a time the gas from the AC tends to leak out ( as all gasses do ) you could try getting this boosted, better not say that if american might get wrong idea, maybe recharged is a better way of saying it..lol, hope this helps
I don't think you do any thing wrong. I suspect the coolant temperature has a loosed connection, or it is bad. If you are certain that your coolant temperature sensor is good then remove the thermostat to run for 2 days to see the temp reading gauge is normal then buy a new one to put it back. Good Luck.
I think your cooling system has air in it, Try and find a place around the thermosat that can be opened a small valve it may just look like a nut, with your car running and radiator cap off, turn the heater on and fill with coolant till it runs out the valve with out air, then top off the radiator to full. also top of the coolant overflow tank. I think this may solve your problem. Merry Christmas!
the ac work that you had done wont do that,start the car ,let it run for a little bit,with a glove on,or a rag squeeze the top radiator hose ,once its full of pressure,when you see the fan go on it should make the hose soft,meaning the thermostat opened,if not change the thermostat,if the fans go on and your thermostats open,you have to have the radiator