Question about 2007 Chevrolet Impala LS Sedan New Cars

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My 2007 Impala LS says its overheating shut off A/C the temp gauge goes all the way up then in an instant comes back down to normal

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CHECK COOLANT LEVEL TO MAKE SURE NOT LOW.IF ALL LOOKS GOOD.CRANK ENGINE LET IDLE FEW MINUTES TURN ON AC MAX LEVEL TO SEE IF COOLANT FANS COMING ON.IF NO CHECK COOLANT FANS FUSE AND RELAYS.IF COOLANTS FANS COME ON WHILE ENGINE OVERHEATING THERMOSTAT BAD.IF ENGINE OVERHEATING FANS NOT COMING ON YOUR COOLANT TEMPERATURE SENSOR FAULTY.

Posted on Sep 01, 2010

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Hello,

You problem sounds like a "Blend Door" issue, you have these doors that open & close and everything in between to adjust air temp. These doors have a "peg" that is connected to an arm or wire just like on a ten speed bike to shift gears, that peg may have broken off.

Another issue may be a stuck open thermostat, if you have a temp gauge is it running at normal temp? If the thermostat is stuck open then heat may become an issue.

I have found several 2007 Chevrolet Impala blend door issues here in fixya.com.

Hope this helps.

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