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Possible Trouble

doug123

By doug123,
in BMW 3 Series Forum

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Guest jeffthro

Guest jeffthro

Posted
Posted

Well, the gauge itself is still working, so hopefully its only the thermostat. Sounds like its probably sticking open. I'm going to guess you're not getting a lot of warmth coming from the heater either?

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Guest Mister Dabsy

Guest Mister Dabsy

Posted
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Just to add...

Did you have hot air BEFORE the CPS change? If not then its either an open stat or air in system...

Other cause could include heater resistor (hedgehog)or even the heater control.

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Guest jeffthro

Guest jeffthro

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I'm not much of a techie, Doug, but if you don't drain you're gonna get terrible messy, water peeing all over the place. Also, a lot easier to catch and refill your anti-freeze. Tip for when you refill your system, fill to top of expansion tank then run engine up with cap off. Will be a fair bit of gurgling and bubbling, keep filling as level goes down until everthing seems to have settled down. Any possible air locks have a better chance of clearing if not under pressure. I am told. Not being a techie. Probably.

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