3 knob HVAC control upgrade
#31
Rennlist Member
#33
Thread Starter
It was suggested to me that the rear ac control could be replaced by this setup, and by using the Max AC mode to turn on the rear system at a preset fan speed. I have the circuit planned for this as either PWM fan control or simple set speed, but have not studied the factory harness diagrams yet for the rear AC. I should get a rear AC control in my hands to see how it connects to the harness.
#36
Rennlist Member
About using a set speed on max AC for the rear AC...
The whole AC system is not capable of a solid "cooling" efficiency with both units in operation, so with max AC on, and then at a high fan speed enabling the rear will really pull down the cooling effect.
And..sometimes, I just run the rear AC because I dont want blown in the face a lot, or have a 4" cold middle arm..or...
I dont know about just enabling the rear AC at a set max/fan value.
I would consider..a simple on/off push button that turns on the rear AC on 'medium' fan independent of the front AC.
The whole AC system is not capable of a solid "cooling" efficiency with both units in operation, so with max AC on, and then at a high fan speed enabling the rear will really pull down the cooling effect.
And..sometimes, I just run the rear AC because I dont want blown in the face a lot, or have a 4" cold middle arm..or...
I dont know about just enabling the rear AC at a set max/fan value.
I would consider..a simple on/off push button that turns on the rear AC on 'medium' fan independent of the front AC.
#38
Thread Starter
OK. Shouldn't be a problem as there are 2 unmarked detents split between the 2 right-most logos. One of these could be used for the rear air only control, while Max AC could run both at once.
#39
Rennlist Member
Max AC is front recirculate, when you want peak cooling...opening the rear system automatically has a dramatic effect on front cooling if your goal is high fan, max-recirculate cooling.
#41
Race Car
Well...I've consistently said that its a classic car and I'm good with the classic console...but I just sprung for the referenced controls off of ebay, anticipating a good outcome here..
:-)
Could you locate the factory A/C button somewhere and use that to initiate the rear A/C on demand? I'd actually be OK abandoning it, I think.
I wonder whether some of the issue could be from refilling refrigerant without the rear A/C activated?
:-)
Could you locate the factory A/C button somewhere and use that to initiate the rear A/C on demand? I'd actually be OK abandoning it, I think.
I wonder whether some of the issue could be from refilling refrigerant without the rear A/C activated?
#42
Rennlist Member
Well...I've consistently said that its a classic car and I'm good with the classic console...but I just sprung for the referenced controls off of ebay, anticipating a good outcome here..
:-)
Could you locate the factory A/C button somewhere and use that to initiate the rear A/C on demand? I'd actually be OK abandoning it, I think.
I wonder whether some of the issue could be from refilling refrigerant without the rear A/C activated?
:-)
Could you locate the factory A/C button somewhere and use that to initiate the rear A/C on demand? I'd actually be OK abandoning it, I think.
I wonder whether some of the issue could be from refilling refrigerant without the rear A/C activated?
I dont have WSM here, procedure may be to turn both on, but either way you add the right amount, and thats that.
The issue is a lack of condenser volume/efficiency. But there is a way to spend a few thousand $ to solve it.
Of if you have a 5spd, install the later model higher efficiency parallel flow condenser that the GTS has.
Last edited by Speedtoys; 09-08-2015 at 10:23 PM.
#43
Race Car
#44
Electron Wrangler
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