Question about 2002 Nissan Sentra

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1997 nissan sentra ac stops at high heat outside when letting the car cool the ac comes back on the temp guage is only about middle not hot?

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I have seen a problem like this just recently. If you do not feel she is low on freon (which can cause this problem). You will have to check for power to the clutch coil during the time it stops cooling. If you have power to the coil or the clutch (there will be one or two wire going to the compressor)(the clutch is a large electro magnet, a coil of wire which must have 12 volts +in and be grounded to magnitize and pull in the clutch plate) If the coil has an internal short, which is ok at low temps say when you first start up your car then as engine bay temps get up to say 140 160 degs. the coil gets to hot to hold in or it losses it magitism power, it all means the coil of the clutch may be shorting out, as temps get heated up everything expands and wires touch wires that sholud not.  I hope this makes sense. Its hard to find if this is the cause. You have to check for voltage  to the coil when the a/c stops cooling to find this problem. 

Posted on Jun 29, 2009

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I have a 2001 nissan sentra. My car fan is running and making loud noise. Also my temparture gage is going up but my car is not overheating.


small engine does take allot to overheat as long as the car stay in motions even though the cooling is not operating, if you were sitting in the heavy and stuck in traffic and the OAT is 98-100 degree with high humidity and running the AC, chances are the engine will over heat quickly. very rare the temp guage become faulty, I would to go ahead and repalce the temperature sensor which gives the guage the correct reading, if have high miles 75k or more replace thermostat which open and close when it reach proper tempature and thermostat switch which turn the cooling fan on and off. all three parts are fairly cheap to fix and replace. all three unit is very important to the engine cooling beside the oil.

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My 2003 nissan sentra would get hot and stall out even in middle of highway doing 70 mph. The guages would go up and down. Would not start up all the time after stalling. had to cool down first. Nissan said it was head gasket, and wanted to charge 1000.00 for the job. I took to local dealer who charged me 550.00. Works fine ever since. Nissan dealer said they do like 3 head gaskets a week on the sentras. They have crappy ones in original parts. They have not recalled though.

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My 2005 Nissan Sentra 1.8s with 55,000 mi. blows cold air from the heater. Coolant not circulating in engine. Lower hose stays cool to touch. Both heater hoses cold. Changed thermostat - didn't fix it. Coolant not leaking or dirty. None in oil - no oil in radiator. Changed worn water pump belt - pump spins freely with no noise or resistance. Cooling fans come on after warm-up. Temperature gauge stays in normal range then jumps to hot and back again. Coolant good to 10 below - didn't freeze here yet. No other problems or repairs to car. Afraid to drive and make worse. Help!

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1 Answer

I have a 1996 nissan sentra gxe.... I just replaced the radiator today and the car still over heated, my only thought as to what the problem could be was the water pump. how do I change the water pump?


sounds like you have a thermostat problem also did you bleed the cooling system of all the air before you put the radiator cap on?
if you have not bleed the system and there is a air lock you will have over heating problems.
the way you can try bleeding the car is let it get up to temp with the rad cap off and let the fans cycle twice and wate till all the air bubbles stop stop coming out.
if the air dosn't stop coming out for a long long time you may have a blown head gasket

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2 Answers

Were are the sensors for the engine fans in a nissaan sentra gxe


One of the common things that gets missed at times is the radiator is down in cooling antifreeze. The car will act as normal during the warm up cycle and then the temperature guage will rise and then it will slowly come back down as the thermostat opens and/or the electric cooling fans come on. In actuality the engine is overheating, but it is not boiling over. The level of abtifreeze is at just the right level of lowness that you experience this phenomenon. After the engine cools off , (DO NOT REMOVE WHEN HOT - YOU CAN GET SCALDED WITH BOILING WATER/ANTIFREEZE)), remove the radiator cap and check the level within the radiator and also the antifreeze reservoir level. You can buy a 50-50 mix of antifreeze and water that is ready to put into the radiator. If the level in both the radiator and reservoir are correct, you may have a bad thermostat or some other problem.
Bob - 2003 Nissan Sentra SE-R SPEC V

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2005 Nissan Sentra, AC blowing hot & engine overheating


most likely a thermostat because the pressure on the a\c will be high if engine is over heating or the fans are not kicking on (check fan relay)

Aug 25, 2008 | 2005 Nissan Sentra

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