Vito 638 heater - Mercedes-Benz Forum
 
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post #1 of 10 (permalink) Old 03-31-2012, 05:46 AM Thread Starter
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Vito 638 heater

Whilst driving the other day I turned the heater down to cold, but after a while when the thing should have been kicking out cooler air it was still very warm!!!
I am away now working at the mo, so can not get to look. I was wondering if anyone else has had this trouble? any ideas on what it will be? will I need to get under the bonnet to sort this out??

Any help would be great ..............................please
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post #2 of 10 (permalink) Old 03-31-2012, 04:59 PM
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I too suffered from this problem.... and intermittent hot air during cold usage.

Only thing was, that about 6 months later, my heater core sprung a leak Wasn't too bad, as the Aussie summer wasn't too far away. Looked into replacing it, that's the easy part. Its what is required to swap it that is the HARD part....
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post #3 of 10 (permalink) Old 04-01-2012, 11:54 AM Thread Starter
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Oh dear!! I will have to have a closer look when I get back home
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post #4 of 10 (permalink) Old 04-24-2012, 04:34 AM Thread Starter
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Anybody have any other ideas where I should be looking??
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post #5 of 10 (permalink) Old 04-24-2012, 04:49 AM
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Control Cable?

There's a blue cable that runs from the heater controls to the valve that is above the clutch pedal, you will need to remove center dash panel and the heater controls and lie on the floor to see the bit that connects to the valve. Sometimes the cable bends at the end or becomes disconnected.

Might be an air lock?

Might also be the valve broken, they are not very strong.
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post #6 of 10 (permalink) Old 04-24-2012, 05:58 AM
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I noticed this problem AFTER i took my pollen filter out.....check the cables too..might have slipped a bit, i've noticed that the controls are getting harder to operate...another job on the list..

...Dont be a sheep.............
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post #7 of 10 (permalink) Old 04-25-2012, 01:39 AM
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heater tap

Behind the air filter is the heater tap, just make sure its closing fully, just a thought
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post #8 of 10 (permalink) Old 04-25-2012, 12:31 PM Thread Starter
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Thank you gentlemen. Vans away at mo having subframe bushes replaced, so will have a look in the next couple of days.
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post #9 of 10 (permalink) Old 05-31-2012, 01:12 PM Thread Starter
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Quote:
Originally Posted by on.electric View Post
Behind the air filter is the heater tap, just make sure its closing fully, just a thought
I looked behind the air filter, but could not see a tap??
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post #10 of 10 (permalink) Old 05-31-2012, 01:15 PM Thread Starter
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Originally Posted by Gandhi View Post
Control Cable?

There's a blue cable that runs from the heater controls to the valve that is above the clutch pedal, you will need to remove center dash panel and the heater controls and lie on the floor to see the bit that connects to the valve. Sometimes the cable bends at the end or becomes disconnected.

Might be an air lock?

Might also be the valve broken, they are not very strong.
I do not see a blue cable? the only cables are black n yellow for the direction of the air. The heater control seems to be on a circuit board??
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