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Overheating 2005 PT Cruiser

 
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  • 1 Post By NorCalGurl72
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Old 30 Jan 2020, 04:21 pm
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Location: Placerville, Ca
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Exclamation Overheating 2005 PT Cruiser

Hello I was wondering if you could tell me why a little after changing my thermostat ...My heater quit working also my PT cruiser is overheating only when it's idle
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Old 30 Jan 2020, 05:11 pm
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Default Re: Overheating 2005 PT Cruiser

Are you getting any engine light diagnostic codes?

Did you check the new thermostat to make sure it opens up all the way before installing it?

Did you put the correct mixture of coolant in the engine cooling system?

Is your low speed radiator fan coming on?

Most important question did you bleed all the air out of the engine coolant system? This is the most common mistake and you might still have several air pockets in the engine coolant system including inside the heater coils.
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Last edited by ptcruisersteve; 30 Jan 2020 at 05:45 pm.
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Old 01 Feb 2020, 09:45 am
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Default Re: Overheating 2005 PT Cruiser

the fact that your heater isn't blowing hot is a great indicator of a failed water pump...
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Old 01 Feb 2020, 10:59 am
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Default Re: Overheating 2005 PT Cruiser

Quote:
Originally Posted by NorCalGurl72 View Post
Hello I was wondering if you could tell me why a little after changing my thermostat ...My heater quit working also my PT cruiser is overheating only when it's idle
Did you "burp" the air out of the system? There is an air bleeder located right below the thermostat housing. You must open it to allow the air to escape while filling the system with coolant.

Also, a half full cooling system may not allow the heater core to warm up.

If this is not your issue, make sure you didn't install the thermostat upside down.

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Old 01 Feb 2020, 10:00 pm
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Default Re: Overheating 2005 PT Cruiser

Lets not forget the heater?AC controls.....

And if all else you are welcome to bring it by my house next week. Just call me!
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Old 16 Aug 2020, 07:38 am
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Location: Placerville, Ca
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Exclamation Re: Overheating 2005 PT Cruiser

Hey there ....ok recently changed the ECT sensor ... first it said voltage was high p0118 and found the plug had a frayed wire.. so switched the plug out for the ECT ran good for 10 mins and then it read low voltage and P0117 and overheated immediately check the fans with a jumper wire both high and low work i also replaced the relays ...the gauge has been working but fluctuates and stops working i seriously have no clue what to do next... this car has been a money pit .... please HELP
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Old 16 Aug 2020, 03:37 pm
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Default Re: Overheating 2005 PT Cruiser

Quote:
Originally Posted by NorCalGurl72 View Post
the gauge has been working but fluctuates and stops working i seriously have no clue what to do next... this car has been a money pit .... please HELP
The last two vehicles I've seen showing a fluctuating (hot-normal-hot-normal...) temp gauge, Cutlass and Civic, had a blown head gasket. A leak down test showed bubbles under the radiator cap. Needed the Cutlass so a small hole drilled in the thermostat allowed me to drive it til fixing it. Venting trapped gasses from the water jacket.

Last edited by circus; 16 Aug 2020 at 03:46 pm. Reason: small hole
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Old 16 Aug 2020, 06:21 pm
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Default Re: Overheating 2005 PT Cruiser

Quote:
Originally Posted by NorCalGurl72 View Post
Hey there ....ok recently changed the ECT sensor ... first it said voltage was high p0118 and found the plug had a frayed wire.. so switched the plug out for the ECT ran good for 10 mins and then it read low voltage and P0117 and overheated immediately check the fans with a jumper wire both high and low work i also replaced the relays ...the gauge has been working but fluctuates and stops working i seriously have no clue what to do next... this car has been a money pit .... please HELP
You need to start answering some of the previous posts on this thread before we can help you.
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