AC/Heater Bleeding radiator? Air bubble? - Civinfo
 
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post #1 of 13 (permalink) Old 15th November 2013, 13:00 Thread Starter
 
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Bleeding radiator? Air bubble?

Hi, pretty sure my radiator needs bleeding as im getting hot and cold air intermittently when ive got my heater on 'Hi'

Does anyone know how to do this?

thanks,
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post #2 of 13 (permalink) Old 15th November 2013, 13:07
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Just drafted a massive reply on how to bleed HOUSE radiators....

Lucky I didn't hit submit.
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post #3 of 13 (permalink) Old 15th November 2013, 13:15
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Just drafted a massive reply on how to bleed HOUSE radiators....

Lucky I didn't hit submit.
Ha I'm a plumber so I was getting ready to do the same :P
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post #4 of 13 (permalink) Old 15th November 2013, 13:19
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Ha I'm a plumber so I was getting ready to do the same :P
Haha. I dug out some YouTube links and everything

You being a plumber is good to know! I'll 'add you as a friend' just incase I have any questions in the future
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post #5 of 13 (permalink) Old 15th November 2013, 14:09 Thread Starter
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damn, sorry guys! would the same rules apply? any ideas?
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post #6 of 13 (permalink) Old 15th November 2013, 14:25
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To bleed the cooling system

Remove the radiator cap, put a funnel in the neck of the radiator, set the A/C to Hi but keep the fan off, set the A./C to fresh air and run the engine at 2500rpm till cooling fans kick in.

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post #7 of 13 (permalink) Old 15th November 2013, 14:55 Thread Starter
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To bleed the cooling system

Remove the radiator cap, put a funnel in the neck of the radiator, set the A/C to Hi but keep the fan off, set the A./C to fresh air and run the engine at 2500rpm till cooling fans kick in.

Simple as that? when you say A/C to Hi, do you mean just turn the dial and leave it?

So if i was to press 'off' first, then turn the dial to 'Hi' ?
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post #8 of 13 (permalink) Old 15th November 2013, 15:16
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Turn A/c on then set temp to high.

Setting it to high temp fully opens a valve that circulates the engine coolant around an extra loop to the heater matrix, that way you can bleed the air out the whole system.
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post #9 of 13 (permalink) Old 15th November 2013, 15:22
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Laney is correct.


But make sure you set the heat to high, turn off recirculate and then turn off the A/C

The coolant goes into a heater core and the squirrel cage fan blows air into it which comes out of the vents.

The heater core is like a mini radiator

Which is why if you have an old bomb that is overheating you get told to run the A/C on hi to help cool down the car.
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post #10 of 13 (permalink) Old 15th November 2013, 15:34 Thread Starter
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Birlliant guys, and this should get rid of any air bubbles? how do i check if need more coolent? is there a dipstick like oil?

fingers crossed!
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post #11 of 13 (permalink) Old 15th November 2013, 17:11
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Have the radiator cap open and the level in the radiator will drop, keep topping it up or else you will introduce more air
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post #12 of 13 (permalink) Old 16th November 2013, 14:59
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Originally Posted by stoney View Post
Have the radiator cap open and the level in the radiator will drop, keep topping it up or else you will introduce more air
Water expands when hot so you may get water flowing out from the neck.
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post #13 of 13 (permalink) Old 26th November 2013, 15:27 Thread Starter
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turns out it was a broken thermostat. a nice 100
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