[DMCForum] Re: BUMP - No air blows when on vent, heater, or defrost

["cruznmd" <racuti1@xxxxxxxxxxxx>]

All true, but the fan shuts down on vent, heat and defrost. That's 
an electrical failure that needs to be addressed.

Rich

--- In DMCForum@xxxxxxxxxxxxxxx, "Joe OBrien" <joeyoseppijoe@xxxx> 
wrote:
> 
> Correct, the mode switch hisses a bit when changing selections, 
but 
> possibly there can be some damaged parts to the diaphram inside. 
> Maybe the areas that direct the vacuum to control the heating?
> 
> If you gonna be in there, I'd order the HCR diaphram from Grady to 
> replace it.
> 
> 
> Joe
> 
> 
> --- In DMCForum@xxxxxxxxxxxxxxx, "lakelanier20" <derek4567@xxxx> 
> wrote:
> > 
> > Joe, Rich, & Elvis,
> >  
> >     Thanks so much for your responses.  I think no one saw my 
> > earlier post because I made it during late afternoon on a 
Friday.  
> I 
> > guess people are out living their "real" lives on a Friday 
evening 
> > rather than sitting on this forum. Hahaha.
> > 
> > Joe, I'm not sure the diaphragm of my mode switch would be my 
> > problem, as I have no hissing when off as you described.  It 
only 
> > makes a slight hissing noise when changing modes, which is 
normal, 
> > right?  But if I open it to check the electrical contacts, I'll 
> take 
> > a look at it.
> > 
> > Rich, when I switch to Vent, Heater of Def the fan motor shuts 
> down.
> > As far as I can tell, no air is coming out of the floor.  My 
temp 
> > knob does have resistance, so I think the cable is ok.  I'll 
check 
> > if the heater core is clogged and the valve in the engine 
> > compartment.
> > 
> > Elvis, I bought my car in Houston in the middle of the summer.  
> The 
> > fan obviously worked because I ran the air conditioning during 
the 
> > test drive, but checking if the heating worked was the absolute 
> last 
> > thing on my mind.  Summer + Houston = Really Hot Outside
> > I will definitely take a look at the electrical contacts on the 
> mode 
> > switch.  But what you were saying about Fuse 18, there's nothing 
> > wrong with that fuse, right?  The problem is more likely in the 
> mode 
> > switch, as you said?
> > Also, I bought all 3 manuals 4 months before I got the car, but 
> I'm 
> > not as mechanically inclined as you.  You're the guy with this 
> > website, right? With the lift in the garage and everything? 
> > (down at the moment)
> > http://retroserver.no-ip.com/
> > I used your front speaker replacement how-to.  It was very 
helpful.
> > 
> > Alright, I'll check out the stuff you guys suggested.  
> > 
> > Thanks again,
> > -Derek L
> > VIN 5302
> > 
> > 
> > 
> > 
> > -----------------------------------------------------------------
-
> > 
> > --- In DMCForum@xxxxxxxxxxxxxxx, "Joe OBrien" 
<joeyoseppijoe@xxxx> 
> > wrote:
> > > 
> > > That is exactly the same issue I half to fix on #2524
> > > 
> > > All my setting worked just fine, but I had a slight hissing on 
> the 
> > > mode switch when off. In my quest to make everything prefect 
on 
> > the car I had to rebuild the mode switch, but for some reason 
when 
> I 
> > was doing it the cheap jew in me decided to regrease the old 
mode 
> > switch diaphram.
> > > 
> > > I should have just bought one of grady's new mode switc 
> diaphrams. 
> > > I used petroleum jelly to moisten the disc to rejuvenate it. 
But 
> > the first time I used TO much. I was paranoid it would dry out 
> soon 
> > > again, and didn't think to consider that ari needs to travel 
> > around those diaphram passages, hence the first rebuild didn't 
> work. 
> > Second time I disasembled it again, wiped a good majority of the 
> > petroleum jelly off, and reassembled it. Everything worked fine, 
> but 
> > it was still kinda "juicy" with jelly.
> > > Hence I lost the functions of the heater, defrosted & vent, 
> AFTER 
> > I reassembled the whole console area.
> > > So next year when it warms up I will buy one of Grady's new 
> > hardcore diaphrams, rebuild it correctly, and be done with that 
> > issue.
> > > Hopefully that will have pointed you in the possible right 
> > direction to diagnose your issue.
> > > 
> > > But hey at least you have AC to keep you warm, it has to be 
> warmer 
> > > than it is outside right now :)
> > > 
> > > Best of luck,
> > > 
> > > Joe OBrien
> > 
> > -----------------------------------------------------------------
--
> -
> > 
> > --- In DMCForum@xxxxxxxxxxxxxxx, "cruznmd" <racuti1@xxxx> wrote:
> > > 
> > > Hi Derek, 
> > > 
> > > I didn't see your original post. You're my closest sister VIN 
so 
> I 
> > > would have responded if I had seen it.
> > > 
> > > When you switch to vent, heat or def does the fan motor keep 
> > working or does it shut down? On heat or def you're not supposed 
> to 
> > get anything out of the console vent and only a whisper out of 
the 
> > > doors. Check to see if air comes out at the floor in the heat 
> > > position.
> > > 
> > > Also, with regard to the lack of temperature change, your 
heater 
> > > core could be clogged or the heater valve in the engine 
> > compartment could be stuck shut. Also, make sure the cable from 
> the 
> > temp knob is attached. Do you have resistance when you operate 
it?
> > > 
> > > Rich
> > > #5335
> > 
> > -----------------------------------------------------------------
--
> > 
> > --- In DMCForum@xxxxxxxxxxxxxxx, "Elvis Nocita" 
<elvisnocita@xxxx> 
> > wrote:
> > > 
> > > Derek - even when you had yor car only a day you should be 
able 
> to 
> > tell us if the fan works or not - when the mode switch is set to 
> > heating.
> > > 
> > > Don't make it more complicated as it is.
> > > 
> > > If the fan doesn't run - I bet the electrical contacts inside 
> the 
> > > switch may have a problem.
> > > 
> > > Also - within 4 months you should already have the manual and 
a 
> > > schematic of the car and with that you could see, that the 
mode 
> > switch position 90 is fed by fuse 18. Then the mode switch feeds 
> the 
> > fan speed switch. So if the fan works on A/C, then the problem 
> must 
> > be inside the mode switch.
> > > Simple, isn't it ?
> > > 
> > > I visited NASA last week, maybe I am on a high-tech trip now ? 
> LOL
> > > 
> > > Elvis & 6548 sleeping
> > >

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