2014 Mustang Internal heater issue. HELP - Mustang Evolution

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Old 03-19-2019, 10:37 AM   #1
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2014 Mustang Internal heater issue. HELP

Hi there everyone.
I am totally brand new to this forum group so I hope you will bear with me if I am doing anything out of order.
My car recently has been having an internal heating problem. What happens is that the heat takes some time to build up and after while it gets warm, then it gets a little hot but it eventually decreases and get cold again. This happens even while driving.
Coolant level in the overflow tank seems to be present so I don't know whats going on.
I hope someone in this group can help me understand what might be going on and what are my options towards resolving this issue.
Any help at all is greatly appreciated.
Thank you.
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Old 03-20-2019, 10:57 AM   #2
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Check the level in the radiator as well.
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Old 03-20-2019, 01:43 PM   #3
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Check the level in the radiator as well.
How? There's no radiator cap which is why there's a cap on the overflow tank.

Could be a problem with your blend door among other things.
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Old 03-21-2019, 06:12 AM   #4
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How? There's no radiator cap which is why there's a cap on the overflow tank.

Could be a problem with your blend door among other things.
No radiator cap? What kind of madness is that?
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Old 03-21-2019, 08:47 AM   #5
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https://www.google.com/amp/s/www.mus...78945/%3famp=1

Here might answer your question.
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Old 03-21-2019, 12:01 PM   #6
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Sounds like a bad thermostat.
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Old 03-21-2019, 01:21 PM   #7
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i'm with RBK. change t-stat .
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Old 03-24-2019, 10:34 AM   #8
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i'm with RBK. change t-stat .
And since you'll have to drain coolant into a basin / onto your driveway anyway, probably worth changing the fluid and any hoses you can get to easily. Cheap insurance.
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