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Old 02-24-2013, 03:43 PM   #1
hemifalcon
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Am I missing something on my heater assembly?

So, here's my '65 suburban cabin air box/diverter assembly.. It's all cleaned up and re-painted--but I'm wondering if this little square hole is supposed to have something inserted in it?? Any ideas?? (I'm talking about the square hole on the inlet portion prior to the diverter)



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Old 02-24-2013, 03:53 PM   #2
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Re: Am I missing something on my heater assembly?

Looks like the spot for your blower motor resistor.
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Old 02-24-2013, 03:58 PM   #3
Reyals Bemus
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Re: Am I missing something on my heater assembly?

The blower motor resistor mounts on the inside of that duct. But maybe some were different?
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Old 02-24-2013, 04:12 PM   #4
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Re: Am I missing something on my heater assembly?

On my '62, it mounts through a hole almost exactly like that on the duct. That setup is different than mine though, so I am mostly guessing. That hole appears to be on the front side of the duct, where mine is on the back, almost directly opposite.
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Old 02-24-2013, 04:59 PM   #5
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Re: Am I missing something on my heater assembly?

Blower moter resistor goes in that hole.
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Old 02-24-2013, 06:51 PM   #6
hemifalcon
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Re: Am I missing something on my heater assembly?

Blower motor resistor is on the opposite side--
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Old 02-24-2013, 06:58 PM   #7
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Re: Am I missing something on my heater assembly?

If memory serves, there is/was a small little sheet metal diverter that clips in there to direct a small amount of air to the floor on the pass side. When that assy is installed, that hole is directly above the passengers feet. I could be wrong, as I recall only ever seeing one or two that were still intact.
The blower resistor does mount on the back, or firewall side of the ducting.
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Old 02-24-2013, 07:06 PM   #8
markeb01
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Re: Am I missing something on my heater assembly?

I’ve never seen one of these duct assemblies with that hole in the front. Perhaps it was added by a previous owner for convenience of replacing the resistor. Does your duct already have a resistor mounted on the opposite side in the same location? I’ve also never seen a diverter with the extra outlet tack welded on the left front pointing toward the driver’s feet. That may also have been added for better heat distribution.
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Old 02-24-2013, 08:41 PM   #9
hemifalcon
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Re: Am I missing something on my heater assembly?

I'm QUITE certain that hole is stock--it's got pristine edges from the cutout stamping.. And there is no "molestation" evident on this entire assembly---there was a piece of duct tape over it when I bought it--but THAT us not going back on... I can't imagine this is a "special" heater--
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Old 02-24-2013, 09:04 PM   #10
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Re: Am I missing something on my heater assembly?

I think its for a deluxe heater. Unfortunately i dont have any pics. But the blower resister goes on the backside of this unit. Which is opposite of this hole.
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Old 02-24-2013, 10:45 PM   #11
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Re: Am I missing something on my heater assembly?

i have 3 with the same hole and a nos heater complete with the hole as showed
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Old 02-25-2013, 01:03 AM   #12
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Re: Am I missing something on my heater assembly?

That hole is a factory hole, which I have seen on every Deluxe or Thrift Air heater I have seen. I believe it is there to direct warm air onto the passenger. There could have been a deflector on there originally, but I have not seen one.
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Old 02-25-2013, 01:22 AM   #13
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Re: Am I missing something on my heater assembly?

dang... I just want to see what it's supposed to look like....
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Old 02-25-2013, 04:56 PM   #14
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Re: Am I missing something on my heater assembly?

Hemifalcon:
Mine has the same hole. I have a 1966 GMC with the deluxe heater (I don't have the nice paint job, however). It looks like there is a flapper that opens and closes off that hole inside the box with one of the three levers on the control panel. I think what you have is all there should be. I think Captainfab has the right answer.


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Old 02-25-2013, 06:25 PM   #15
ChevySixty6
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Re: Am I missing something on my heater assembly?

I think mine has this mystery piece on it. I'll check tonight when i get home. If so i'll get a pic of it.
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Old 02-25-2013, 06:29 PM   #16
Reyals Bemus
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Re: Am I missing something on my heater assembly?

For the record, my Thrift Air system does not have that hole.
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Old 02-25-2013, 10:28 PM   #17
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Re: Am I missing something on my heater assembly?

I'll jump in with this...my resister hole is a 7/8 inches by 15/16ths. Also has what I call ears to hold the resister in place...,
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Old 02-25-2013, 11:34 PM   #18
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Re: Am I missing something on my heater assembly?

I checked both of my deluxe heater vent the one i have in the pickup and the one on the shelf. Both have the hole but neither have anything on or over the hole. Andi was the first to remove them from the pickups and i don't remember anything over that hole.
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Old 02-26-2013, 10:31 AM   #19
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Re: Am I missing something on my heater assembly?

Well i looked at mine, and i don't have that piece. I'm with "tincan1966", i've seen that piece before. Maybe i'm thinking of my old '69 pickup, i don't remember. I did a search for heater pictures/diagrams and only saw one picture that showed the hole, but not anything in it.
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Old 02-26-2013, 10:37 AM   #20
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Re: Am I missing something on my heater assembly?

Quote:
Originally Posted by ChevySixty6 View Post
Well i looked at mine, and i don't have that piece. I'm with "tincan1966", i've seen that piece before. Maybe i'm thinking of my old '69 pickup, i don't remember. I did a search for heater pictures/diagrams and only saw one picture that showed the hole, but not anything in it.
You may be exactly right, it culd have been on my '69 C-30 that I saw that. Every one of these '64-'66's I get all have duct tape over that hole or nothing at all.
Sorry if I sent anyone on a wild goose chase.
Altho, now I am thinking of making a piece for mine......
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Old 02-26-2013, 11:37 AM   #21
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Re: Am I missing something on my heater assembly?

The resistor is definitely on the opposite side. I restored one back in the summer and off the top of my head I can't remember what goes in that hole (if anything). I'll look tonight though and get back to you unless someone beats me to it.
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Old 02-26-2013, 11:47 AM   #22
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Re: Am I missing something on my heater assembly?

There was a tiny deflector that fit into that hole, it was simply a friction fit. I've only seen it on a couple of trucks-was prone to fall off easily and get lost.
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Old 02-26-2013, 01:15 PM   #23
hemifalcon
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Re: Am I missing something on my heater assembly?

If anyone has a picture of that little deflector, please post it. I will probably make a little one out of aluminum or something that will NOT fall out...
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Old 02-27-2013, 01:16 AM   #24
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Re: Am I missing something on my heater assembly?

I am with the rest that have a hole cut there, and the resister is on the opposite
side. On a 65 GMC custom...Vernski
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Old 02-27-2013, 04:26 AM   #25
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Re: Am I missing something on my heater assembly?

Since this question was asked, I have seen the hole in a few pictures in build threads. They have all been empty. It would be interesting to see one in place.
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