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Old 12-30-2014, 01:00 PM   #1
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Cab A/C blower

I've never seen this happen. I started a trip yesterday and when I left I had the defroster on so I did not notice that there was not any air coming out of the vest. The fan was working and as you could hear blowing. When I turned the vent setting to A/C and Max A/C nothing came out. Again you could hear the fan running just no air. Is the vet controlled by a fuse or motor? I should add that this is a 1999 Winnebago Brave V10 where do I start? HELP!! I need this to work as I especially need the defroster part to work. Thanks.
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Old 12-30-2014, 01:15 PM   #2
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Not sure in your case but most of the Heat & AC controls are automotive and are controlled by vacuum.

See if you can locate you vacuum pump & lines on the engine and firewall. On mine there is a black bulb that acts as like a reservoir. See if you can find a loose connection which would disable the controls. See if you can hear a leak.

In my case I have a vacuum generator that works off the compressor system.
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Old 12-30-2014, 01:36 PM   #3
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Good luck with finding suitable solution.
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Old 12-30-2014, 02:01 PM   #4
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Most will blow in defrost mode by default so see if air is blowing there.

Look for vacuum hose loose.
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Old 12-30-2014, 02:02 PM   #5
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Big THANK YOU!!

Quote:
Originally Posted by jacwjames View Post
Not sure in your case but most of the Heat & AC controls are automotive and are controlled by vacuum.

See if you can locate you vacuum pump & lines on the engine and firewall. On mine there is a black bulb that acts as like a reservoir. See if you can find a loose connection which would disable the controls. See if you can hear a leak.

In my case I have a vacuum generator that works off the compressor system.
Well that was the cheapest fix I've had on this old rig so far. I opened the hood and there was the hose hanging down. I re attached it and the blower is working great. Thank you again.
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Old 12-30-2014, 06:51 PM   #6
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Glad to help, I've posted a number of questions on this site and usually get really good responses.

I spend a lot of time just reviewing daily posts to see if I can learn anything and answer if I think I know the answer.

Good luck on your trip
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Old 12-31-2014, 02:47 AM   #7
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NOTE: if you hear the blower running, then it is working,

As you found the problem was with the directional controls, it was stuck on DEFROST. I have had that happen a time or two as well.
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