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layne
New User
Aug 1, 2013, 11:04 AM
Post #1 of 7
(1124 views)
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i got a 04 pontiac grand prix the car over heats sitting there no fans come on till it gets to almost over to overheating but turn a/c on both fans come on and keep engine cool at normal temp, changed themostat and coolant sensor, no lose of coolan fluid eather, im stumped
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Hammer Time
Ultimate Carjunky
/ Moderator
Aug 1, 2013, 12:02 PM
Post #2 of 7
(1110 views)
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That's because there is nothing wrong with the car. That is exactly how it is designed to work.
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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.
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layne
New User
Aug 2, 2013, 11:05 PM
Post #3 of 7
(1067 views)
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but a couple of days ago it was staying at normal temp
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Tom Greenleaf
Ultimate Carjunky
/ Moderator
Aug 3, 2013, 12:53 AM
Post #4 of 7
(1063 views)
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? It changed so that would bug me. Yes, using A/C frequently forces fans to go full blast. It may not have been full of coolant and may not be now either.
May be normal but the change would make me investigate - starting with checking actual temp (infrared thermo at thermostat outlet) or sometimes temps of heater outlet air give a clue.
Did air temp (weather) change suddenly? Gauge could be wrong?
Does it stay stable at speeds over like 40 all the time? I say it should or would be ticked at the design as if anyone would care that designed it,
T
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Hammer Time
Ultimate Carjunky
/ Moderator
Aug 3, 2013, 2:34 AM
Post #5 of 7
(1059 views)
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It probably changed because you were using the AC at the time which can make it run cooler because the fan runs all the time. Without the AC the fan isn't programmed to come on until about 225 degrees.
Make sure the coolant is full and you don't have any loss but I wouldn't be too concerned beyond that.
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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.
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Tom Greenleaf
Ultimate Carjunky
/ Moderator
Aug 3, 2013, 3:21 AM
Post #6 of 7
(1056 views)
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Didn't need to hear what I just said again,
T
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Hammer Time
Ultimate Carjunky
/ Moderator
Aug 3, 2013, 3:27 AM
Post #7 of 7
(1052 views)
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You didn't need to comment either.
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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.
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