no fan blower

[Cadman]

In my Buick 92 Lesabre with Auto Climate Control I have no fan coming on for the air cond or heat. I have checked the fuses and replaced the motor and even the ECC control. What should be the next thing I should do?
Thanks

[RABarrett]

I would suggest obtaining a manual for the vehicle. Thgough they make their share of errors, it would be the place to start for troubleshooting. I notice that you started by replacing parts. Is there voltage and ground to the motor? If one of these is missing, it would be the place to start.

[Cadman]

Originally Posted by RABarrett

I would suggest obtaining a manual for the vehicle. Thgough they make their share of errors, it would be the place to start for troubleshooting. I notice that you started by replacing parts. Is there voltage and ground to the motor? If one of these is missing, it would be the place to start.

It does have power but it is like the whole system is bad because the vent don't open or close either.

[jmarhal]

It's most likely the electronic control panel on the dash. You may want to try and find a used one. A new one from GM is about $400 bucks.

[Cadman]

Originally Posted by jmarhal

It's most likely the electronic control panel on the dash. You may want to try and find a used one. A new one from GM is about $400 bucks.

I got a used one at the junk yard and pluged it in and the same thing. So I do'nt think that is the problem. What else would you check?

[jmarhal]

That could be why they junked the car?

[1989Buickguy]

Did you ever find out what was causing your problem? I am having the same problem with my 89 LeSabre.

[jmarhal]

The dealer told me it's most likely the electronic control head, located on the dash. They said the part would cost about $400. For that, I'll put up with the surging. Let me know if you find out something different. It is still driving me nuts!

[Cadman]

Originally Posted by jmarhal

The dealer told me it's most likely the electronic control head, located on the dash. They said the part would cost about $400. For that, I'll put up with the surging. Let me know if you find out something different. It is still driving me nuts!

No I have not figured out why it is not working. I plan on tearing into it after Christmas. Does yours work at all? Mine nothing the vents or the fan.

[jmarhal]

O' yes. The fan works and just surges on low and medium speeds. It's fine on high. It's about 15 degrees here now. The old Buick does get warm inside. When the fan starts surging, I simply turn up the radio.

[1989Buickguy]

Where is the blower motor relay located?

[1989Buickguy]

Well, it's gotta be in the control unit or connection somewhere, if I give the dash a good whack it kicks on.

Think I gotta do the T-stat though, it doesn't get that hot. That looks like fun too.

[jmarhal]

I think the relay is located behind the glove compartment. You can open the glove compartment all the way, you'll see some rubber tabs on top that act as a stop. Move those tabs and the door will swing all the way down. You should be able to see the relays.

Good luck!

[1989Buickguy]

Thanks for the info. After going shopping today, I have noticed that the low setting doesn't work at all. Maybe it is the relay, I'll look into it.

Gotta have heat Consistently.

[yakman]

Originally Posted by 1989Buickguy

Well, it's gotta be in the control unit or connection somewhere, if I give the dash a good whack it kicks on.

Think I gotta do the T-stat though, it doesn't get that hot. That looks like fun too.

My 89 Lesabre with manual HVAC blows little heat. I have installed a new T-stat and anti-freeze is 50/50 mixture. There is lots of heat at radiator. But lines going from water pump to heater core feel only luke warm. Can hear the vacuum working while moving the dash selector. Any suggestions ?