Chevy 2010 Equinox 4 cylinder when idling heat from vents is cool unless rev engine?

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Thread: Chevy 2010 Equinox 4 cylinder when idling heat from vents is cool unless rev engine?

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    2.4 Liter SIDI ECOTEC markm75's Avatar
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    Chevy 2010 Equinox 4 cylinder when idling heat from vents is cool unless rev engine?

    I have a 2010 equinox with about 130k miles on it.. for some time now i've noticed that when you get the car going and even after running awhile, if you are sitting idling, the heat from the heater is luke warm.. unless i rev the engine to about 2k rpm (or rev in general). I think when you turn it on its idling around 700 rpm give or take, maybe 800.

    I'm thinking this may be related to the issue i have where sometimes it stutters/hesitates on startup and more recently mpg on the avg being about 3 mpg less than usual.. to remedy some of this i was going to have the plugs replaced.. i was also told by a shop that there may have been carbon build up on the throttle body, but despite them cleaning it it didnt fully help.. the hesitation does not always occur either.. and some times when there is stuttering i get an error popup on the screen related to "check stabilitrack" and then it goes away.

    Any thoughts on the heat?

    Thanks in advance
    2010 Equinox 1LT 4cyl AWD
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    R2-D2 Astromech Droid Ed753's Avatar
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    Re: Chevy 2010 Equinox 4 cylinder when idling heat from vents is cool unless rev engi

    Have you checked your coolant level?
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    Re: Chevy 2010 Equinox 4 cylinder when idling heat from vents is cool unless rev engi

    If the coolant level is okay (check the radiator - not just the overflow jug), you may have a engine cooling thermostat that is stuck open. This will cause poor heat output at idle and should set a DTC - but will not illuminate the "check engine" light. The code is determined by a slow warmup caused by a stuck open thermostat. The slow warmup will cause a drop in MPG, especially in cool or colder weather.

    You should be able to get the code scanned / retrieved at any major auto part's store.

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