2002 nissan gxe overheating and no heat

2002 NISSAN 240SX
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MAD6920
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i have a 2002 nissan gxe milage is 56,793 that has an overheating and no heat problem when driving i have no heat and vehicle overheats less than an hour on road ive changed thermostat flushed heater core and refilled raidiator and i get heat for a few minutes then it blows cold air then temp. gauge shoots up to red then overheats please help!!!!!!!!!
Jan 2, 2007 at 7:58 PM
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RASMATAZ
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Remove the Stat and see what happens to your overheating problem

Do you hear the cooling fan? when engine is idling?
Jan 2, 2007 at 8:58 PM
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MAD6920
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what is the stat?? and yes the fan does come on when overheating but not when idle
Jan 3, 2007 at 7:52 AM
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MAD6920
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if u mean the thermostat i will do that and see what happens but i do know it works i put it into a pot and boiled it and it did open
Jan 3, 2007 at 8:01 AM
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MAD6920
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i did take out the thermostat and filled the raidiator drove the car i do get heat now and i notice the temp gauge stays in the cold will that cause a problem and if not is it ok to leave it that way during the summer too???
Jan 3, 2007 at 7:17 PM
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RASMATAZ
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Its your choice-Remember the computer has to read the temperature from the coolant temperature sensor for other purposes such as fuel delivery and tranny shifting/overdrive etc. Best bet is just get another T-Stat with the correct Temperature for your model.

The final decision is yours-Good Luck
Jan 3, 2007 at 7:38 PM
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MAD6920
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i have just one more question i was reading some of the other posts and i seen somewhere about a heater control valve does my car have one and if so were is it??

oh and thanks for the help :D
Jan 4, 2007 at 2:10 AM
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RASMATAZ
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Should be on the heater hose before it goes in the heatercore.
Jan 4, 2007 at 4:27 AM