Heater vent help - JeepForum.com
 
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post #1 of 8 Old 01-07-2012, 10:44 AM Thread Starter
dd4bama
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Heater vent help

I only use the ventilation system for heat during the winter. Otherwise, I never use or access it. Is there any reason this vent needs to be open other than when accessing outside air? Is it ever open when using heat?

The reason I am asking is that one of the little brackets under the dash that opens/closes one of the vents broke off, and it's holding up a bunch of projects. I would like to just leave it and move on if I can.

Thanks.






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post #2 of 8 Old 01-07-2012, 12:07 PM
Coiz
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That is the main fresh air inlet door that feeds air to the blower motor. If you want any type of significant airflow, you will need that door to function.

Mike
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1979 CJ7, FI 5.0L Ford, NP435, D300, Full floated D44 Detroit, D30 Detroit EZ Locker.
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post #3 of 8 Old 01-07-2012, 01:21 PM Thread Starter
dd4bama
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Quote:
Originally Posted by Coiz View Post
That is the main fresh air inlet door that feeds air to the blower motor. If you want any type of significant airflow, you will need that door to function.
I was afraid of that, but thanks - I appreciate the info.
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post #4 of 8 Old 01-07-2012, 02:36 PM Thread Starter
dd4bama
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I noticed that there is no wire to manually move that particular vent - only the fresh air vent on the cowl. How exactly does this vent work?
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post #5 of 8 Old 01-07-2012, 03:38 PM
CrazyHorse6
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Should have been one there- maybe pulled by a PO?

CJ7, 258, Dana 20 T-case, Dana 30 & AMC 20, TFI Ignition upgrade, MC 2150 carb, YJ tub mod
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post #6 of 8 Old 01-08-2012, 07:03 AM Thread Starter
dd4bama
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VOILA! OK, for you out there struggling with this, I finally figured it out. First, I am a weekender mechanic that just enjoys Jeeps and working on them - I apologize for insulting you on here that are experts.

I have been complaining about my fan upgrade (the Chevy Blazer motor upgrade) for months, that it did not change air flow much. Yesterday, attempting to solve the problem above, I discovered that if the passenger vent is closed, and the cowl vent is open (feeding the heater), the new fan blows me out of the cab. The open passenger vent reduces flow significantly.

So, the answer to the above question is this:

1. The functionality of the driver's vent is irrelevant to heater functioning. If your vent is broken like mine, just secure it up underneath the dash and move on.

2. Pulling the "air/vent" cable halfway out opens the cowl vent, which supplies air to the heater/blower.

3. Pulling that cable all the way out opens the lower passenger vent, which aids only in venting in outside air, and diminishes heater capability significantly. In other words, you never need to do this unless you want to vent in air flow in the summer months.

Very happy about this. For the record, the difference with the Chevy Blazer motor upgrade is amazing.
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post #7 of 8 Old 01-08-2012, 07:07 AM Thread Starter
dd4bama
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Also, solution for broken bracket...I just drilled a hole in the little bracket and slipped it on the vent rod end. I'm going to see if they can just pop a little weld bead on the end to fuse them together without melting the whole area. If not, it's 100-mile-an-hour tape and moving on.
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post #8 of 8 Old 01-08-2012, 07:22 AM
CrankyD
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I just slapped mine back on and shot a tiny little weld over it (right on the end of the stud) and it held.
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