Likely the programmer board (the part that controls the HVAC). I will check the trouble flowchart for you in my FSM and let you know tonight from home what the factory says to do...
87 brougham ac fan misbehavior
Gosh, forum system logged me off while submitting thread. So I'll have to put it all in all over again. :hmm:
Anyways, as you might have seen, I've just introduced my '87 Brougham to this forum in a separate thread.
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This car is in immaculate shape, as expected with this milage.
There is however a small issue that showed up which makes the ownership experience 99 instead of 100. It's an awkward behavior of a/c fan.
As you can see on the picture below, car is equipped with automated climate control.
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It operates in 4 basic modes:
1. Econo - no compressor, all functions automatic incl. fan
2. Auto - compressor on, all functions automatic incl. fan
3. Low - compressor on - low fan speed
4. High - compresson on - high fan speed (but not max)
It all worked fine until recently. Now when I start the car or engage any of the operating modes I will hear all those flaps closing or opening to redirect air where needed. Compressor clutch engages. But fan does not. It stays quiet and no air flows through.
I thought fan is dead. But it's not! I accidentally found that all I need to do is to make it move by giving it a max power (max speed) impulse. I can do that by pressing windshield defrost mode (max fan speed) or by lowering temp setting to absolute minimum (again - max fan speed). This is sufficient to start the fan. One second is enough to make it work. Then I can go back to any mode that I wish for and it will work just fine. No probs. Until I switch it off (a/c or a car). Then switching it back on requires same "starting" - max speed for a second, then use any mode I wish for and it will work just fine. I think it also happened once, that while working system set the fan to a lowest speed setting (temp might have been just right) and it stalled or just stopped turning. I had to start it again by lowering temp to minimum for a second.
What can it be? I am totally lost. I thought that fan is stalling, is stuck or something and needs max power to start moving. Or maybe it's a fuse somewhere? Not a clue.
I've had similar problem in other car - fan would operate only in highest speed - but that was a manual climate car. And the problem was solved by replacement of fuse.
Anyways, as you might have seen, I've just introduced my '87 Brougham to this forum in a separate thread.
This car is in immaculate shape, as expected with this milage.
There is however a small issue that showed up which makes the ownership experience 99 instead of 100. It's an awkward behavior of a/c fan.
As you can see on the picture below, car is equipped with automated climate control.
It operates in 4 basic modes:
1. Econo - no compressor, all functions automatic incl. fan
2. Auto - compressor on, all functions automatic incl. fan
3. Low - compressor on - low fan speed
4. High - compresson on - high fan speed (but not max)
It all worked fine until recently. Now when I start the car or engage any of the operating modes I will hear all those flaps closing or opening to redirect air where needed. Compressor clutch engages. But fan does not. It stays quiet and no air flows through.
I thought fan is dead. But it's not! I accidentally found that all I need to do is to make it move by giving it a max power (max speed) impulse. I can do that by pressing windshield defrost mode (max fan speed) or by lowering temp setting to absolute minimum (again - max fan speed). This is sufficient to start the fan. One second is enough to make it work. Then I can go back to any mode that I wish for and it will work just fine. No probs. Until I switch it off (a/c or a car). Then switching it back on requires same "starting" - max speed for a second, then use any mode I wish for and it will work just fine. I think it also happened once, that while working system set the fan to a lowest speed setting (temp might have been just right) and it stalled or just stopped turning. I had to start it again by lowering temp to minimum for a second.
What can it be? I am totally lost. I thought that fan is stalling, is stuck or something and needs max power to start moving. Or maybe it's a fuse somewhere? Not a clue.
I've had similar problem in other car - fan would operate only in highest speed - but that was a manual climate car. And the problem was solved by replacement of fuse.
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1 - 9 of 9 Posts
let me try to do that
do you mean to turn it up to max or just leave it at say 75?
btw: last night when i switched it off and switched it on again it worked just fine
gosh - this time i hope that i made a fool of myself and everything is just ok
:thepan:
darek
1 - 9 of 9 Posts
