Comments on: Airconditioning

By: Rob Healey

Rob Healey — Sat, 10 Dec 2011 01:28:40 +0000

Hi Gary, mate that was a few years ago!! “if the blower only blows full speed, an inline fuse, under the hood, near the bulkhead has blown – I replaced mine with a 15 amp fuse and have had no further trouble. ” I had to re read my article!!

The clue is that it is an inline fuse and near the bulkhead. From memory now I think it might have been below the wiper motor area – sorry I can’t say exactly. I’m assuming your vette is like mine and converted to Right Hand Drive- so every converter moves things a bit differently – if yours is still left hand drive, go to the Corvette forum, the guys there are really helpful – http://www.corvetteforum.com

“The fan is stuck on high and will only blow in the defrost mode… before it would only blow on your feet,” my first guess would be either your climate control is faulty or maybe a vacuum line to a door in the vent system is loose

By: Gary

Gary — Fri, 09 Dec 2011 21:34:35 +0000

I just bought a 1990 and I was excited to see the pictures in such detail on the blower module. I was told that it was my problem as well. However it and $200 later did not fix the problem. The fan is stuck on high and will only blow in the defrost mode… before it would only blow on your feet,

You mentioned the bulkhead….there might be a fuse….. since I have only owned the car for 9 days can you tell me where to look for the fuse…. bulkhead?

Once again thanks for the great detail and pictures!!!!

By: Doug

Doug — Fri, 22 Apr 2011 23:49:29 +0000

Well done on your Air Con article. I have an 88 vett with 78K Kilometers
here in Sydney. It was in storage for 10 years.
I have had the car for 3 years now and was stumped as to where the fan
control unit was. Yes the US guys all said on the top of the Air box, I did
not realise they inverted the unit when the left to right conversion was
done. Thanks for your great site. I enjoy my car and was considering selling
it. There are no buyers out there so I am thinking of keeping it and slowly
getting it back to a better condition. Doug

By: admin

admin — Fri, 19 Feb 2010 04:28:39 +0000

G’day Peter – I guess your vette is still LH Drive, that makes it so easy to get at the module!! When my module failed it left the heater fan blowing even with ignition off and key in my pocket.

I don’t know how else it fails.

If you disconnected the module and the fan stopped, it suggests the module is faulty but have you checked the factory service manual – the electrical section will tell you how the circuit works.

It’s extremely difficult to look after a 20+year old Corvette without owning the factory service manual!!

I would just mention that one night I leaned into my vette to get something and heard a short brrt, about 10-20 seconds later another brrrt – it was the power seat trying to move back, probably to finish an adjustment made earlier that day. When I move the seat now, I always finish by moving it the other way a few mm, to make sure the switch is off. I mention that in case your power draw could be something else.

By: Peter Smith

Peter Smith — Thu, 18 Feb 2010 21:07:52 +0000

Hi, I have an 86 corvette and i noticed that after a couple of days of no usage, the battery was drained sufficently enough not to allow it to start, unless i jumped it. After many days of searching and unplugging things, and re-plugging and removing bulbs etc etc, i finally disconnected the blower fan module (that you have at this picture http://robhealey.com.au/Corvette/wp-content/uploads/hvaccontrol1-600×450.jpg) and finally joy, the amps that were being drawn, stopped being drawn. now i bypassed the actual blower with the meter to find that something before the blower is causing the draw of amps. so i am assuming its either the module, the ECC inside the car, or something else. any ideas? or any ideas on how to test the module? (its a 6 pin module). I live in the UK so its not quite so easy to pick up a new module to replace it and thus expelling the module as the problem. Cheers in advance