A/C Blower Not Cutting It!

[Boltgunner]

My '84 Accord sedan just can't push enough air on a hot day! My A/C guy checked it out and he thought that the blower was giving her all. Little doors under the dash are up to snuff, he says the motor resistance is good. I am not sure if checking resistance is a good way of telling if the fan motor RPM is where it should be. Any ideas, previous experiences, suggestions? :burn:

[LX-incredible]

Try cleaning out the evaporator.

[Boltgunner]

Evaporator has been de-leafed...

Thanks for the reply!

[LX-incredible]

I don't know if it is possible on those cars, but if the motor is wired backwards, it will push about half the air as normal. Some aftermarket motors don't come with the connector attached, so it is a possibility that someone hooked it up wrong. Try hooking it up to battery voltage. On 86-89 the blower switch and resistor control the motor voltage through the ground, which seems a little backwards to me...

[offthahook]

Man, I'm with you. I deleafed my blower and hoped it would push more air. No dice. I've wanted to put a 90-3 Accord (or newer) blower in there cuz those push some air. Of course, fitment would be the issue. I think your blower is fine; they were just not super strong to begin with. I feel your pain.

[Boltgunner]

One thing I may do is to unplug the connector at the motor and check the voltage at the connector at max speed setting. If it ain't 13.8 I will have to see if I can find a way to direct wire it somehow...

The A/C dude had suggested I take the motor out and get it rewound for a higher RPM, but he also said I might end up pulling more amps, which would mean I would have to stoutify the wiring...

[2ndGenGuy]

My blower motor is pretty weak too. Maybe some nice dark tints will help keep the car cool?

[Boltgunner]

Question to ALL;
Is there any insulation provided from the factory that lies between the headliner and the inner surface of the roof?
I may add something up there to kill the heat burning through...
Also, glass tinting is big in the south and I suppose it helps keep everything cool.
Also, I use a fantastic dash protector made by a California outfit - http://www.canvasworks.com/ - go to HeatShield. Military strength heat shield that fits your windshield PERFECTLY.
Also, check out www.usstuff.com - great site for US made stuff.
I would love to adapt a blower to mount on the interior intake to the existing blower so I could BOOST the existing blower for really hot days - about 95 deg. F and up, which we are getting now.
Thank GOD for FREON!!! :cheers:

[Hazwan]

Am I supposed to get same voltage 12.8 something (I know its kinda low) with every speed settings at the blower connector? Or am I just retarded?

[Boltgunner]

I am pretty sure the voltage you get at the motor connector will be lowest at the FLOW setting on the fan speed knob, and as you increase the fan speed by turning the knob up each detent, the voltage goes up, thus speeding up the fan motor. I am assuming the maximum fan speed would be at the car's battery voltage, and I am assuming the alternator is giving the battery about 13.8 V.

[2ndGenGuy]

Doesn't Honda put the switch on the ground though? So when the fan speed is adjusted via the switch, it's actually putting resistance on the ground? That would mean that unless you're testing voltage on the same ground that the fan is using, you'll always see 13.8v?? Or am I completely wrong on this one?

[2oodoor]

yYea I think the resistance is controlled on the ground side for fan speed.
Have you tried moving the slider knob on the dash some? the little thing there by itseld between the middle vents? That made a huge difference in the blow factor on both my Hondas

[Boltgunner]

I am ASSUMING the resistance is before the fan, not after. I guess there's only one way to find out, but I would rather drink a beer and forget about it till later...

[Boltgunner]

roodoo2, got no slider doohickey...84 model!

[2ndGenGuy]

Slider doohickey! The temperature controller... you've got one.

[Hazwan]

My 81 got one too!

I'll check the voltage later and see.

[Boltgunner]

Got no slider between the vents...

[2oodoor]

Got no slider between the vents...
that is the whatchamacallit I speak of, I forgot you were in an 84 but really wasnt sure it is just a Honda thing. It controls the ductwork somehow.

[2ndGenGuy]

Slider between the vents? Whosawhacthawha?

[Boltgunner]

Iszat some of that Native Washington State Indian lingo? HOW!!!

[Boltgunner]

How do I post a photo? Sez below I cannot post attachments! I was gonna show you my center outlet...waaaah

[2ndGenGuy]

You should upload it to a site like Photobucket first, then they give you a link after it's uploaded that you copy and paste into your message.

[Boltgunner]

http://i211.photobucket.com/albums/bb213/Boltgunner/IMG_6634.jpg


The 1984 Accord Center Vent! If you look closely, you will see my forehead print just above the vents!

[2ndGenGuy]

Ouch! Those look just like mine... No air eh? Most of the plastic arms on the vacuum actuators are broken on my car... Look up underneath the dash and make sure that everything is together. Do you ever hear clicking from the vents when it's on a certain setting?

[Boltgunner]

Have not heard the clicking...she blows, just not enough for a back seater to notice.

I found a squirrel cage blower on a surplus web site that puts out about double the CFM that the stock one puts out, but adapting it means no outside air. But, in Houston, outside air can kill ya after a while. And, with four windows to crank down, it is almost like have a convertible in the shade. So, my next mission after the carb attack might be a new blower.

[2ndGenGuy]

Sweet! Why no outside air? If you get a blower that is at least close, you might be able to cut down the air ducts to fit it a bit better... Or at least adapt the fittings somehow. Maybe a 3g blower???

[Boltgunner]

Check this out - http://www.surpluscenter.com/item.asp?UID=2007071523455394&item=16-1279&catname=electric

I would have to turn this guy sideways and support its weight, plus connect it to the evap inlet. Plus, merge the housing that has the door in it so the outside air could be connected on demand.

Anything is possible with cubic dollars!

[2ndGenGuy]

Check this out - http://www.surpluscenter.com/item.asp?UID=2007071523455394&item=16-1279&catname=electric
I would have to turn this guy sideways and support its weight, plus connect it to the evap inlet. Plus, merge the housing that has the door in it so the outside air could be connected on demand.
Anything is possible with cubic dollars!

22.5amps!!!!

That's like 1/3 of what your alternator puts out... I can see it now, you turn on the A/C and it starts snowing inside the car as all the lights dim! :D

[Hazwan]

LOL

Interesting idea BTW :)

[Boltgunner]

Well, what I would try first is to "rig" it to blow into the opening where the air presently enters from within the cabin (I like cockpit better!), thus "boosting" the air into the present blower. That way you could use it to "chill out" the car, then resume ops with just the regular wimp-o-blower...

[2ndGenGuy]

^^^ Definitely a good idea... Interesting how one might accomplish this. Maybe hook it up to the switch on setting 3. :) Then full blast is really full blast.

[Ichiban]

.
Anything is possible with cubic dollars!

That's fucking awesome!! I love it!!

I just kicked a rat out of my blower motor today, I was stripping the asphalt shit off of the floor, and for some reason, reached over and turned the fan on. Moments later I was ripping it out. Pictures tomorrow.

[2oodoor]

I know on AC fans for the home, the squirrel cage type have to have a certain amount of air flow resistance to keep from drawing too little or too much amperage. You have to set those up by reading the specs on the motor and use a clamp on amp probe and adjust the outlet of the fan so the amps read to spec. If you have it wide open it will eventually burn up the motor. I assume this could apply to this DC motor as well since it states an max amp draw.

[Boltgunner]

True. You want some back pressure on the squirrel cage outlet to limit current draw...

[Ichiban]

Here's what the rat did...other than piss and shit everywhere.
http://i82.photobucket.com/albums/j263/guyhatesmycar/100_0919.jpg
My glove box was full of this shit as well.

[2ndGenGuy]

That's what mine looked like when I first got my car...

[Boltgunner]

I don't know if any of you have an electric leaf blower, but I do, and I might try to set up a test to see if adding an external "pre-blower" like I discussed earlier has any merit.

Dang, if I didn't have to go to work I could mess with this car every day and not run out of stuff to try!

[2ndGenGuy]

I don't know if any of you have an electric leaf blower, but I do, and I might try to set up a test to see if adding an external "pre-blower" like I discussed earlier has any merit.
Dang, if I didn't have to go to work I could mess with this car every day and not run out of stuff to try!

Dude, you're tellin me! No work, combined with unlimited funds would build one hell of an Accord. All I think about all day at work is what I can do to my car next...