Question about 2004 Mazda 3

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Temp gauge on my Mazda 3 fluctuates from hot to cold to nnormal

Running idling it doesn't matter, it fluctuates.

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Temp gauge and ready heater issue

Posted on Dec 11, 2014

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1 Answer

Why is temp gauge fluctuating while driving car is not hot.


Check the coolant level. Sometimes when the coolant level is low, it will cause gauge fluctuations like you suggest, since air is getting into the cooling system. When air is in the system, it causes the thermostat to open and close frequently resulting is wild temp gauge swings.

Mar 12, 2015 | Cars & Trucks

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My 2005 Mazda 3 is not blowing any heat and the temp. gauge is running on the cold side


Is the check engine light on? Are you sure the coolant level is full?

Nov 26, 2012 | 2005 Mazda 3

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Engine coolant Temperature gauge fluctuates


Watch the temp gauge when the electric radiator fans come on. The temp sensor that controls when the fan comes on may be faulty.

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2004 mazda mpv engine racing and cooling fan not working


coolant temp sensor tells the computer how hot or cold the engine is so it can regulate the idle and fuel mixture, when it fails there usually is no cooling fan and you will have trouble starting the engine and keeping it running.

Oct 08, 2012 | 2004 Mazda MPV

1 Answer

2002 sunfire surges at idle with a/c on and a/c blows cold at speed, warm at idle


The temp gauge will go up due to the added load of the AC on the cooling system, and as long as it doesn't overheat you are fine. I would have the system checked for a low charge, the symptom,s fit. You will need gauges and then the pressures tested to find out what the system charge is doing.

Jul 09, 2012 | 2002 Pontiac Sunfire

2 Answers

1990 dodge dakota 2.5 over heats temp gauge erratic


For car running hot and overheating issues, I suggest to you go through this help links. Click this link below and go through the troubleshooting procedure to take care of the problems: ----

temp gauge goes erratic? http://technoanswers.blogspot.com/2012/01/heater-blows-intermittently-and-temp.html

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Temperature gauge keeps fluctuating up and down close to red? http://technoanswers.blogspot.com/2012/01/temperature-gauge-keeps-fluctuating-up.html

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Car runs hot? http://howtobyme.blogspot.com/2011/11/car-runs-hot-in-traffic.html
-----------All types of car overheating problems and troubleshooting?

http://technoanswers.blogspot.com/2011/11/all-types-of-car-overheating-problems.html
Car freeze overnight and started overheating while driving?http://technoanswers.blogspot.com/2012/01/car-freeze-overnight-and-started.html-----------Engine Overheats and heater blowing cold?

http://howtobyme.blogspot.com/2011/11/engine-overheats-and-heater-blowing.html

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Car overheats and Air blows hot at idle?
http://howtobyme.blogspot.com/2011/11/car-overheats-and-air-blows-hot-at-idle.html
--------overheating? http://schematicsdiagram.blogspot.com/2011/12/buick-century-overheating.html
----------Car engine Overheats and transmission starts slipping?http://schematicsdiagram.blogspot.com/2011/12/car-engine-overheats-and-transmission.html
----------

Temperature gauge does not move and no heat when heater is ON? http://technoanswers.blogspot.com/2012/01/temperature-gauge-does-not-move-and-no.html

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This details will help.Thanks.

Feb 07, 2012 | 1990 Dodge Dakota

2 Answers

Temperature gauge fluctuates and the heater blows cold air


Definitely check your fluid level in your radiator. Top it off all the way. I've seen that happen multiple times on cars that were low on anti-freeze. If that doesn't work try replacing your thermostat. It's cheap and the easiest place to start if topping off the fluid doesn't get you fixed up.

Oct 16, 2009 | 1997 Chevrolet Camaro

1 Answer

The engine idle fluctuates the temp gauge always reads hot even on a cold start radiator is always hot


Is it actually hot the radiator Imean. If so check thermostat ,coolant level,of both ok than faulty guage.

Oct 02, 2009 | 1998 Honda Civic

1 Answer

Fluctuating engine temp a/c sends out cold air intermittently


Here's the thing. The ECU will shut down AC if the engine temperature is too hot. If the coolant temperature sensor is malfunctioning (lying to the ECU) telling it that the temperature is hotter than it actually is, the computer will turn the AC OFF.

Sep 11, 2009 | Hyundai Motor 2003 Elantra

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