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2005 temperature issues

 
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Old 31 Mar 2017, 05:21 pm
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Default 2005 temperature issues

So, i finally got this thing running good and now I have cooling issues. Here's whats going on. I've let it idle to come up to temperature, It gets to 3/4 and I'm not getting a fan to come on. I checked the actual temp on my scanner and its 176 F, now I have a 195 thermostat. So, is the temp sensor bad? The top radiator hose isn't hot and the water coming from the bleeder screw is very hot. Any ideas?
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Old 31 Mar 2017, 07:07 pm
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Default Re: 2005 temperature issues

Fan should come on when the temperature sensor gets to *208 just over the 1/2 mark on gauge. Have you checked the wiring/plug or replaced the temp sensor..??
Also, does the fan come on when you turn on the A/C..??
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Old 31 Mar 2017, 07:18 pm
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Default Re: 2005 temperature issues

Is your engine on? If so what are the engine trouble codes?
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Old 31 Mar 2017, 08:47 pm
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Default Re: 2005 temperature issues

No engine codes, runs great. But the temp gauge is running up to 3/4 and the top hose is barely warm. Meaning the thermostat hasnt opened yet to circulate. I tested the fans and both speeds work when jumpered, but when the temp gauge says 3/4 I tested for voltage for the fan and nothing. I'm thinnking temp sensor is messed up. Going to replace it tomorrow. My scanner says temp is 176, but temp gauge is at 3/4. Weird.
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Old 31 Mar 2017, 08:48 pm
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Default Re: 2005 temperature issues

A/C isnt charged so I havent turned it on yet. Tired of breaking the ac lines to get to things.
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Old 01 Apr 2017, 12:51 am
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Default Re: 2005 temperature issues

I would suggest getting a thermal gun and see what the temperature is at the thermostat.

Doing a full diagnosis is important before starting to replace parts.

What brand engine temperature sensor do you have on the PT Cruiser?

Some members have had the cluster go bad causing the temperature gauge not to read correctly.

Some members have had the PCM go bad causing this issue but very rarely.

I would definitely make sure you do a full diagnosis and post what you are finding out.
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Old 01 Apr 2017, 06:19 am
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Default Re: 2005 temperature issues

Sometimes air remains in the higher areas of the cooling system.
These pockets can interfere with coolant circulation.

Something to check, in this regard, is the amount of heat delivered through the cars heating system.
With the motor warmed up, run the heater at full hot and check if it is indeed hot. If not, there is air in the system or some other blockage.

To have an air free system the radiator cap must hold pressure and the reservoir and associated hose must be intact.

If you are confident that your cooling system is air free, then I would start to suspect a non opening thermostat.

Good luck.
Hope to hear of your solution soon.
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Old 03 Apr 2017, 08:58 pm
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Default Re: 2005 temperature issues

The gauge is off, temp got to 210 and the fans came on and cooled right down. I did change the coolant temp sensor and thermostat. Anyone know how to fix the temp gauge?
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Old 04 Apr 2017, 07:00 am
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Default Re: 2005 temperature issues

My belief is that the gauge itself is controlled by the engine management computer.
If that is the case, the most suspect component is the temp sender unit.
The computer will only reflect what it receives as Input from the various sensors.

Best case scenario is to run the car through a few warn up/ cool down cycles allowing the system to pressurize and de pressurize.
With a good radiator cap and intact reservoir the remaining air in the cooling system works its way out.
If there is air by the sensor it is erratic at best.
Sometimes a few of these cycles does the job!

If cycling has no effect then I would suspect the sender.
Do you have your old sender to swap back in?

Glad to hear of your progress so far.

Good luck.

Last edited by JDK52; 04 Apr 2017 at 07:02 am. Reason: Misspelled good as God. All assistance welcomed though.
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Old 04 Apr 2017, 07:28 am
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Default Re: 2005 temperature issues

Quote:
Originally Posted by badams270 View Post
So, i finally got this thing running good and now I have cooling issues. Here's whats going on. I've let it idle to come up to temperature, It gets to 3/4 and I'm not getting a fan to come on. I checked the actual temp on my scanner and its 176 F, now I have a 195 thermostat. So, is the temp sensor bad? The top radiator hose isn't hot and the water coming from the bleeder screw is very hot. Any ideas?
one or more control systems are failing. if the termostat opens at 195, and the upper rad hose gets hot at this point, and the scanner didn't register 195 until it opened while the temperature gauge rated 3/4 of its scale there are multiple problems you're having.
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