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Discussion Starter · #1 ·
My 96 Aero has a habit of blasting cold air when the external temp. sensor warms up, for instance, you can travel along with a set temperature no problem but when you stop in traffic and engine heat warms the sensor behined the front bumper (Ext. temp readout on dash display also increases) the system thinks weather is warmer and blasts me with cold air. When car moving at speed again, temp. on display drops back to normal and system gradually returns to 'as set'. Plugging in the diagnostic thingy at my local Saab specialist shows all components to test OK.
I've swapped the main ACC panel and interior temp sensor with that on my 97 CSE. Made no difference to Aero and CSE works perfectly with either.
Any ideas/experience of this anyone?
 

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This seems to be quite a common problem. judging from other posts here. I just work around it by switching the ACC off for a few minutes (before I turn blue!) then on again. It might take two or three such cycles to clear and come back to normal.
 

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A common maintainance problem with ACC is the internal air temp sensor/fan clogs with dust. It's situated on control pannel below heated seat switches (i.e. round grill about size of 10 pence piece).

If this is clogged then it will usually read higher internal tempretures than actual.

Solution, ideally remove unit (clips out of dash) and clean - or leave in situ and use a vacume cleaner to suck out dust.
 
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