Question about 2003 Saab 9-3

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Have 9.3 saab 2lt Low turbo petrol, fan for heater in cab works great but when I stop and turn engine off fan carrys on running? have to remove fuse every night, any ideas please

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Usually when the fan stays on is for a certain amount of time to allow cooling off the engine but if it goes on and not going off there has to be some kind of a short or another wire allowing that to happen without shutting off

Posted on Nov 14, 2009

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The fan doesn't always run, only in certain situations when additional cooling is needed (high load, or in stopped traffic, or when you turn off the car). Is your engine overheating?

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the cab heater fan?, there can be 4 fans on some cars.
front condenser, 2 on rad, and 1 in cab heater box.
the cab fan? does it fail on high too?
it has a switch, (marked fan speed)
the switch is bad ,if low speed are dead. and high are good.
or wiring to it , the motor or the fuse.
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Have an '02 Saab 9-3 turbo, 140,000 miles drives great, but have strong exhaust smell coming into the cab through the heater vents... Can't actually see exhaust leaking, but when I pop the hood I can smell...


Have the catalytic convertor checked, sounds like it may be trying to stop up. Some cars have an exhaust vent between the exhaust manifold and the exhaust pipe, it could not be operating properly. The purpose of this piece is to help the engine warm up in the winter to get the heater working faster. Most of them are vacuum contolled and the vacumm line might have a small hole or the cast iron unit is old and just stuck. you might free it up if you can get it off to work with and lube and replace on the car.

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Blower relay switch is sticking. Replace a/c heater relay switch located inthe fuse box under the hood.

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Check your fuses. if all is well, more than likely it is yor fan motor

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1 Answer

1994 Saab 900 S convertible running hot


You don't say whether your electric fans both work...

First, check fuses #25 and #6 (both 30 amp)

There is a fan thermoswitch is on the left side of the rad. Turn the ignition on, and after pulling back the boot, short across the two terminals with a screwdriver.

If the fan runs, fan and wiring are both good, but thermoswitch might be faulty.

If fan only runs when thermoswitch is shorted like this, switch needs to be replaced (I strongly recommend that you get the low temp switch to prevent overheating - your temp gauge will not go over the middle position even on the hottest days; also get a low temp thermostat,and ALWAYS get a Saab stat, not an after market one! The SAAB stats are three position, and most after market ones aren't)

if the fan doesn't run when switch is shorted, check for voltage between green wire and ground at the switch.

Voltage indicates faulty fan, if no voltage then check the fan relay J in the main fuse box for the A/C rad fan, and also check relay G - it's for the rad fan.

Hope this helps!

Saabreur

Jun 22, 2009 | 1994 Saab 9 3

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Saab 95 3.0 tid turbo with sticking waste gate


you have just described exactly the problem i'm having with my 3.0 tid, did you get it fixed in the end?? cheers, O

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Running noise in the dash, runs down a new battery


Ah ha! The intake valve for the interior temp. control was continuing to run after the engine was off. It was making noise (like a running fan). I removed it. So what the auto temp does not work. It is an old car... if you get hot turn down the air, if you get cold, turn up the heater. Removing this did not affect the effectiveness of the heat or air.

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