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Re: heat/defrost Posted by Ari [Email]  (#2847) [Profile/Gallery]
(more from Ari) on Wed, 31 Oct 2001 13:06:43
In Reply to: heat/defrost, Peter S, Wed, 31 Oct 2001 11:43:34 Members do not see ads below this line. - Help Keep This Site Online - Signup |
Yes, it's possible that the blower motor has died, but by all means check the blower motor fuse in the fusebox. Replacing the blower motor is a big deal, labor wise, and it makes sense to do everything you can to avoid it. The blower motor has a resistor pack on it, and sometimes I've seen the connector to the resistor pack fail and melt. That would cause a motor not to run.
When the heater core fails, it leaks. No heat is not a sign of a bad heater core - wet feet is. The heater core is hot all the time. The temperature of the cabin is set by a flap that mixes hot air from the core with cold air from outside. That flap is controlled by servos inside the dashboard - that whizzing sound you hear. The flap connects to the servo via a wire and a little plastic arm. The arm has been known the break, and the flap falls one way or another - usually to cold in winter, and hot in summer. This is common enough that Saab sells a $8 kit called the 'mixer arm repair kit".
First off, run the ACC (automatic climate control) self test - press the AUTO and VENT buttons at the same time. After about 40 seconds of whirring and burping, it'll show a number - if it's 0, there are no faults. Anything but 0, and that's the number of faults. Go to the Townsend site, specifically:
http://216.78.172.244/climate_control_folder/acc1codesall.htm
To see what the codes mean. This might help with the blower motor.
Next, open the hood. At the base of the windshield, on either side of the intake grill, are horizontal plastic covers. Remove the cover on the passenger side (left-hand drive cars) - it's held on with a few clips and two torx screws. On the right-hand side (looking to the front of the car) of the blower box (the one with the grill) will be a shaft coming out. That shaft is connected to the mixer flap. The shaft will have an arm, and on the arm is a stiff piece of wire that dissapears into the firewall, about behind the glove box. That connects to the servo. Make sure the wire is in place, and the arm isn't broken. The self test only checks to see if the servo moves - it doesn't know if the flap moves.
Look at the blower motor and see if the wiring looks OK, and the connector isn't fried.
If all that checks out, you may have to dig into the dashboard to check out the servos. A servo may have died (self test shows that). But the arm on the servo may have come off, the stiff wire broken, a lot of things.
Good luck!
posted by 140.157....
, Wed, 31 Oct 2001 13:06:43 <-- Viewing This Message
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