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Re: Faulty Fan Heater - The main vents are just blowing...
All cars have a recycled air weather its called max or just recycle its doing the same thing. So if your getting cold air in one spot and hot in another it means your vents are not blocking where they are suposed to. It could be just a simple fix, by getting into the dash where your vent controls are and looking at the flap that tells air where it can and cant go. if its stuck then it needs to be cleaned and oiled. If the cable is corrodend clean it and oil it so it can move freely, or just reconnecting it may be the fix. it sounds like you are going to have to be adventurous, and play with the mechanics of your vents. Typicaly theres really nothing tough there to work on, just REMEMBER WHEERE ALL THE SCROOS AND CLIPS GO. I have forgotten where a few went in the past and had to listen to sqeaking noises till I took it apart again. There are vent seals wich are no more than the weather stripping you buy at the hardware store the 1/8 inch thick tape. You may need to thin it down with a razor, usually not. but it works great for fixing the seals in car heaters, because its the same thng just a different color. Which no one will ever see.
Re: Faulty Fan Heater - The main vents are just blowing...
Go to your idrive., climate the vent settings. you will see a person along with vent areas on the side. If this persons color is blue it blows cold air so turn the dial for vent closest to that person until the color changes red then hot air comes out on the vents for driver and passenger. Then let me know.
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It sounds like the heater motor may not be operating. When you switch the heater fan on can you hear the motor running? If not then it may have blown the heater fan fuse, check the fuse's and then try it again. If the fuse is ok then it could be a faulty switch or fan motor.
You don't say whether the fan starts and shuts off with the bumps, or
the heat goes cold but the fan stays on. If it's the fan shutting off
and coming back, you most likely have an intermittent connection to the
blower motor somewhere at the fuse box, the fan speed control
switch or the fan motor, or a loose ground connection at the fan motor.
The fan motor is visible under the right side speaker grille on
the dash. Make sure you re-connect the short black corrugated hose to
the grill vent or you won't have defrosting on that side!
The air distribution rotary switch controls where the air goes. The fan
speed switch controls exactly that: fan speed. the temp rotary switch
controls the coolant temp into the heater core. You need to clarify what
you mean by "Also, the dash controls
for the vents won't allow me to turn up the
You might also have one or more of the
is you vacuum tank properly connected and are there
leaks in the vacuum piping? The tank is in the driver side rear wheel
well below the trunk deck on a convertible, and in the passenger side
front fender area on the other cars. It's a white bottle with one or two
hoses connected to it. If not properly on, your vacuum operated heater
flaps won't move. Does the air distribution knob make sucking or hissing
noises when you set it to different positions? If not, check the tank
connections, look for vacuum line leaks, then suspect the vacuum valve
behind the distribution knob.
if the air distribution rotary switch makes noises
when you change its setting, but nothing happens, then suspect the
vacuum solenoids that open and close the heater flaps - could be a loose
vacuum line or a defective vacuum solenoid
the shaft connecting the temp control knob to
the heater valve behind it may not be properly in place. This can be
and adjusted if necessary, from the left side speaker/vent cutout on
top of the
dash. Make sure you re-connect the black flex hose to the air vent tube,
or you'll get no defrosting afterwards!
the centre vents always blow
cold air; a brilliant idea from Saab so the driver (and passenger) can
get fresh air in the face and stay awake while the rest of the driver,
passenger and car is toasty!
It sounds like your cabin air filter has stopped up common problem on these cars. You have to remove the glovebox to get to it. If this filter stops up, your fan will be running on high but hardly anything will come out of the vents.
Check the water contol valve operation ( under hood connected to heater hoses), do you have a full load of coolant?, also air mix door under dash, is the temp of the coolant hot?.Check them all out, you'll find it
wow...here it is spring and no one answered either of you? Is there a large volume of air when fan is on high? Where is it going? Or do you not hear anything from the fan? The 240 has an awesome heater. On high it would heat a small home! If no sound, your blower motor is dead assuming the fuse is good. If you hear the fan blowing, figure out where the air IS going. Note that the only way to turn the dash vents off is with the white Oreo dials. To defrost, only that button should be pressed in and dash vents off. Behind the dash switches there is a maze of short vacuum hoses. Often times, people monkey w/ these and reconnect them incorrectly. Haynes manual or Chilton's have proper diagrams. It could be that the vacuum hose coming from the manifold and entering the firewall is split on the under side and not visible, also.