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Old 07-28-2016, 04:44 PM   #1
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Dash air not blowing

The dash air on my 02 Seabreeze isn't blowing adequately to keep the cab area cool here in Virginia. It sounds like the fan is running normally but there is no volume of air coming out of the vents. Any tips to fix this? Thanks.


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Old 07-28-2016, 06:53 PM   #2
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There are 2" or 3" black vent hoses under the dash. Did one come loose ?
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Old 07-29-2016, 12:08 AM   #3
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Check the defrost vents, is the air coming out of them? If it is you have a vacuum leak. The default position of the dampers is to defrost with lose of vacuum.
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Old 07-29-2016, 08:08 AM   #4
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Yes, it is blowing out of defrost. Can manually move lever to divert to vents. Hoses under dash look good, where else might leak be? Do we need to pop the doghouse open?



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Old 07-29-2016, 11:52 PM   #5
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Are you saying you can manually move the dampener to devert the air flow? If yes read the following. You need to find the vacuum reservoir, on my 1999 F53 it is a small round black plastic reservoir with two lines connected to it. One line comes from the engine manifold the other goes to the AC control. Once you find the reservoir check if you have vacuum coming from the engine by disconnecting both tubes from the reservoir. With the engine running check for vacuum on one of the tubes. If neither have vacuum then trace line to the engine manifold for a break in the tube. If you find vacuum from the engine you need to trace the line from the reservoir to the AC control for a break. My vacuum reservoir is out front behind the hood. Go to the link below and click on your AC control style, that will take you to the page with troubleshooting guides. My AC control style the second one on the left.

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Old 07-30-2016, 08:46 AM   #6
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Yes, I can manually move lever to divert flow to dash vents. I will look into the rest of your tips and get back to you. We tried to trace the vacuum lines back but they quickly disappeared up under the dash. Didn't notice a vacuum reservoir but will look again now that I know what to look for. Thanks.


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Old 07-31-2016, 09:29 AM   #7
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just bought a 1997 national tropical. how do I drain the fresh water. tank is under the bed with what they said was a drain cock. turned it but no draining. suggestions?
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Old 07-31-2016, 09:38 AM   #8
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Does your vehicle have cabin air filters?

If these are plugged, this can severely limit the airflow.
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Old 07-31-2016, 10:03 AM   #9
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Quote:
Originally Posted by chboone View Post
Check the defrost vents, is the air coming out of them? If it is you have a vacuum leak. The default position of the dampers is to defrost with loss of vacuum.
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Old 07-31-2016, 05:38 PM   #10
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The filters do need cleaning but I'm pretty sure it's a vacuum problem, flow is good if I manually move the lever.


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Old 08-01-2016, 06:40 PM   #11
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drain cock was stuck now draining like a rainy day thanks
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Old 08-03-2016, 02:16 PM   #12
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Found break in vacuum line at a coupling where it goes into what looks like another vacuum reservoir which I could get to from under the front of the coach. It is on the right just behind my leveling jack reservoir. Made the connection and had major flow to the AC dash vents. Thanks for your help!



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Old 08-03-2016, 07:26 PM   #13
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Thanks for the update. Great you fixed the problem.
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