Electronic climate control
Thread Starter
Instructor
Joined: Sep 2002
Posts: 137
Likes: 0
From: Toa Baja Puerto Rico
Electronic climate control
My 87 Coupe is equipped with the electronic climate control. I usually use it full blast and the LED display reads "10" as the highest fan speed. The thing is that while driving the fan speed drops to about half for a while. Then it goes back to full speed. A while later it drops down. Then goes up again. It does that all the time even if I set it on "manual".
I took it to an AC shop but they had never done any work on these systems and they did not know if that was the wy it should work or not. They checked and the system has a full charge.
Is this the way it works or is something wrong?
Please help, it is hot and muggy down in PR.
I took it to an AC shop but they had never done any work on these systems and they did not know if that was the wy it should work or not. They checked and the system has a full charge.
Is this the way it works or is something wrong?
Please help, it is hot and muggy down in PR.
Race Director
Joined: Aug 2003
Posts: 13,421
Likes: 8
From: Lake Mary Florida
Up to the point you said it did it under the manual setting, yes that is the way its suppose to work. It's trying to keep it at the desired temp setting by increasing air flow. Normally as you start moving the vehicle, I believe its 25 mph, it stays on one flow setting then kicks into auto mode as soon as it senses air flow, then adjust according to the internal temp on the vehicle vs the setting.
Le Mans Master
Joined: Dec 2000
Posts: 7,839
Likes: 22
From: San Diego, Ca
On Manual control, it should remain constant. You need to duplicate it in the garage and monitor voltage on the tan or brown wire at the module. This is the input from the dash and it should be constant 7 volts on manual 10. If it isn't the dash assembly is bad. If it stays the same, monitor voltage on the output or purple wire to the blower motor. It should be 12 volts and if it drops while the input remains at 7 volts, the module is usually bad. If it remains a constant 12 volts, the blower motor is probably shot, but check for high resistance on the purple wire.
Race Director
Joined: Jul 2004
Posts: 11,108
Likes: 0
From: Behind The Redwood Curtain, The State of Jefferson
on a similar note:
anyone know how to make the 'warmer' button work, turned the temp down to 60 when I first got it, because it was hot out, now.... it's cold at 6:30 AM heading towards the coast.
anyone know how to make the 'warmer' button work, turned the temp down to 60 when I first got it, because it was hot out, now.... it's cold at 6:30 AM heading towards the coast.
