EATC modification, maybe drdave can help?

[iselltonsofthings]

I was debating posting this under the "use any eatc" but that thread is pretty dead, so I thought I'd make a new one.

Seeing that it is well below freezing outside, I pretty much run the heater on high in my sho non stop while driving.

First off, I've never actually used the auto function of the eatc.

Since the SHO is getting up there in miles and was not the most well cared for car, the heater core is starting to loose efficiency, probably due to being clogged with dust.

I have to use the air recirculation in order to keep a "room temperature" in the car. But this means that I have to use the max a/c button because standard vents, use outside cold air vs. the max a/c reusing the already warm interior air.

Here is the problem, as I'm driving and the windshield starts to fog, I will hit the windshield defrost button on the eatc. I'll let that run for about a min or two then switch back to the max a/c so it will recycle the warm air through the vents. This is where the problem is.

When I hit the max a/c button, it automatically resets the eatc temp to 60 degrees, which means while I'm driving down the road, I have to tap the red temp increase button 2 dozen times to get it back up to 90 degrees.

This is very frustrating because I will do this every 5-6 minutes because the windshield will start to fog up but need to switch back to the max a/c through the vents to keep me warm.

Is there any way to program the Max a/c button to "remember" the last digi temp setting, so that the next time it is pushed, it will go back to that setting.

I hope that this is not too long of a post. Thanks for any help. Sincerely, Scott

 

[iselltonsofthings]

For what it is worth, this is my winter beater sho. I'm not looking to dump a lot of money in this one cause I'm saving to mod the other. Scott

 

[Camarok]

Well, first of all, get some 409/fantastic and clean that windshield, if this is a pretty new "winterbeater" previous owner could have smoked in it, and in winter that tar comes up pretty easy. Those cleaners cut through that kind of grossness throwup . ( I work at a bar with lots of smokers and that's what we use ) After that get some Stoner brand Invisible glass cleaner to get off any residue of the 409/fantastic, or windex/any glass cleaner.

See what happens there, then we can go from there, seeing you don't want to do any heavy mods to the EATC, although I am not the one to talk about EATCs so someone else might have a solution... BUT CLEAN THAT GLASS!

<small>[ January 27, 2004, 02:43 PM: Message edited by: Camarok ]</small>

 

[iselltonsofthings]

Thanks for the info, but I might have mislead where I need the help

I have no problem clearing off the windshield and the car was never smoked in.

I use the windshiled defrost to clear the windshield.

Then I switch over to the max a/c button because since the heatercore is clogged with dust, it is simply not efficient enough to heat the outside cold air. I absolutely have to recycle the already warm air from inside the cabin.

I want the warm air to come from the vents and to keep me warm. So I have to use the max a/c because it recycles the cabin air and blows it through the vents, just like I want.

But I have to keep hitting the red temperature increase button every time I switch from defrost to max a/c. Cause when you hit the max a/c it sets the digital temp to the lowest at 60 degrees.

This is where I'm frustrated. I think that it is a horrible setup. When you hit the max a/c, it should start recycling the air at whatever the last temperature setting was.

This is a little added info. Who has their car set to 90 degrees in the summer, so that they want the convience of it automatically setting it back down to 60 when the hit the max a/c? More then likely, the digital temp was already at the lowest setting of 60, but the driver might want the additional cooling with the a/c pump. It just doesn't make sense that the max a/c button changes the temperature setting.

Sorry for such a huge post. Thanks for taking the time to read it. Sincerely, Scott

 

[SHOZ123]

I doubt if the heater core is clogged with dirt. More than likely it is clogged internally. Try some cooling system flush followed with a heater core flush.

 

[Zap]

I believe that the EATC is supposed to have memory for each button and that something is causing it to not retain your settings. The temp will not stay the same between buttons unless it was previously set that way.

 

[Camarok]

well my ac clutch and ac system is shot so I can't tell if this works or not.... i hit max ac.... then i hit auto, and it went back to the temp i had it at. Is this what you are talking about zap?

 

[91 SHOplus]

Scott, If it didn't go down to the coolest temp setting, then it wouldn't actually be the 'MAX A/C', it would be "Recirculate'.

I second the flush suggestion. It may only help a little, but it's a little more heat than you have already.

See Ya.

 

[iselltonsofthings]

In simple, please explain how to properly flush the radiator system on my sho.

Is there a special brand of radiator flush. You also said about a heater core flush. How do you accomplish that. I thought that the antifreeze runs through the heatcore every time the engine starts anyway.

Thanks. Scott

 

[DDakRT]

Put some antifreeze on a rag and clean the inside of your windshield. It should take care of your fog issue for a while.

 

[Ptatohed]

I agree with you 100% percent Scott!! And, just like you, I brought this up once and I got the same responses you did! lol. Stuff like: "It's a MAX button, you push it because you want MAX cooling, therefore it has to be at 60^". This is B.S.! If it is say 90^ outside and you want your car cooled to the temperature you prefer (let's say 70^), it isn't going to get to 70 any faster if you have your climate control set at 60^ or 70^. I hate that the climate control chooses 60^ for me. Just because I want to use the recirculation feature doesn't mean I don't want my temp. setting to remain where I left it!

With all that said, I still don't understand your situation 100% Scott. If I want heat, I always use the 'Vent'. I figure, why make the compressor run if I don't have to? So why are you using MAX for heat?

Anyway, to answer your original question, no I don't think you can program the MAX to 'remember' your temp. setting. frown