 Heater blower, Do they really work ? |
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| jim_hoyland |
 May 16 2015, 06:20 AM
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#21
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Get that VIN ?  Group: Members Posts: 9,312 Joined: 1-May 03 From: Sunset Beach, CA Member No.: 643 Region Association: Southern California 
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QUOTE(r_towle @ May 15 2015, 09:08 PM)  Jim, If you get a chance to read a 356 manual you will see that opening a window to create the Venturi is actually how you operate the heat in these cars... It may also be in an old vw beetle manual. My blower fan in the engine bay works great, it for when you are idling.. When you start driving or raise the rpms, the fan over powers the blower motor. But...and it's a big but....you need to open the window because the whole system cannot overcome the close pressurized cabin....so when you open the window it all works. I agree with that; I have a question for you: Can you feel air being pushed through by the heater fan at idle or with the engine off ! |
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| r_towle |
May 16 2015, 07:13 AM
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#22
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Custom Member Group: Members Posts: 24,584 Joined: 9-January 03 From: Taxachusetts Member No.: 124 Region Association: North East States
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Yes, but it's slow....but enough to make defrost work.
Typically when I need it, it's for defrost that I turn it on, and I move all the magic levers to direct all the air to defrost. See if you can find someone to allow you to read a 356 owners manual, it's a fun read... |
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| BeatNavy |
May 16 2015, 07:59 AM
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#23
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Certified Professional Scapegoat Group: Members Posts: 2,924 Joined: 26-February 14 From: Easton, MD Member No.: 17,042 Region Association: MidAtlantic Region
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Jim - just one or two more comments (from me anyway). Yes, I could feel air coming out with the blower on at idle or engine off, but it was not a particularly impressive. I did just confirm that my old engine does NOT have the flaps on the fan outputs. So Mark's (Bartlett 914) comment (post #4) about those was probably relevant in my case.
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| jim_hoyland |
May 16 2015, 01:55 PM
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#24
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Get that VIN ? Group: Members Posts: 9,312 Joined: 1-May 03 From: Sunset Beach, CA Member No.: 643 Region Association: Southern California
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OK- things are getting better. First, the heater blower was wired in reverse, when I reversed the + and -, the fan blew air instead of sucking air. I can feel a slight flow under the dash. Ran the car with window open 2 inches; started with 72 ambient temp and got it up to 89 after a nine mile drive- things are a lot better.
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