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Mixer flap broken Posted by Ari [Email] ![]() ![]() In Reply to: '86 - heat is stuck on ON!, Annie, Fri, 21 Jan 2005 09:43:39 Members do not see ads below this line. - Help Keep This Site Online - Signup |
What you have is quite unusual - the flap usually fails cold in winter, hot in summer.
The fix can be very simple and cheap. Open the hood, and right at the base of windshield, you'll see two horizontal plastic panels, one on each side of the cabin air intake. Remove the panel on the passenger side - it's held on with a couple of screws and some clips. Right in the center there is the box with the blower motor and heater core - it's got the little grill on top. Coming out of the passenger side is a shaft with a little arm on it, and on the top of the arm, a stiff wire that disappears back into the car, right about behind the glove box. Check this picture from Quasi's page:
http://www.quasimotors.com/Blower_motor_flaprod.htm
That arm connects to a flap that controls the heat - it mixes cold outside air with warm air coming over the heater core. If that arm breaks, or the wire just falls off, the flap will fall one way or another. As I said earlier, it usually falls to hot in summer and cold in winter, but even sometimes failures go wrong.
If the wire just fell off the arm, put it back on. What usually happens is the tip of the arm where the wire connects breaks off. The really good news is that since this is pretty common, Saab created a repair kit. It's called the "Mixer flap arm repair kit", and runs about $8. Yes, that cheap. It's a metal arm that slips over the old, broken, plastic arm, and you can connect the wire to that. If the arm has broken at the very base, then it gets expensive - the flap must be replaced, and that requires removal of the heater core and blower motor, which is lots of labor.
If the arm seems perfectly well connected, turn the heat up and down, and you should see the wire move in and out. If that doesn't move, then the problem is in the dash.
But the most likely problem is the end of the arm broke off, and the kit for it is cheap. and it is something you can do yourself very, very easily.
posted by 192.249....
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