Temp sensor and blower heat issues

[Steve McF]

My outside temp display has been playing up. Well not the display, but the temp seems to be less than acurate,  showing 60 deg C. However, when I got home tonight, it had ceased to register any temperature at all!!!

Possibly related, or maybe not, I cannot get hot air out of the blowers unless I set the temp to "Hi". If I select 27 deg C or less, all I get is cold air.

What is going on there then?

[sgould]

Has the sensor fallen out of the hole or become disconnected?

The  sensor is right in he middle of the lower grille.  It can fall out of the clip, but should still give a reading.  If no reading, it's probably died, or maybe the cable has detached.  It runs across to join the loom behind the LH foglamp.

[Audax]

The sensors are remarkably bad quality, I think the exact same genuine part can be had from Vauxhall for less than Saab.

[aerojon]

the sensor is tied into the ac system,a new one will cure the problem if everything else checks out..

my sensor is the original,still ok..

[Steve McF]

Is it easy to access?

I seem to recall on our Zafira I could reach down inside the engine bay. Not sure the 9-3 engine bay is quite so spacious?

[aerojon]

need to access from underneath,need to remove the tray or it can be changed thru the slats in the bumper(seen it done)

see pic for location..

[Steve McF]

Yes that looks like it is in the same place as the Zafira. From memory, it wasn't that expensive a part? Does anyone know the part number, and whether I can just order it from a Vauxhall dealer?

[sgould]

9152245

That's a GM part number, so if fitted to a Vauxhall, it will have the same number.

[Norfolk Jim]

I had these issues last year with my 58 Aero TTiD. Some days it would say 5 deg when it was 25 deg and then the reverse. I managed to get lower grille off and found connections a little messy. Cleaned the sensor and clipped it back in - ok for a while then I noticed it hanging there one morning and no reading. A/c all over the place. Blowing hot air when mid 20's outside and not even cold when on low setting.

Ordered a new one online and made sure very carefully fitted and all was fine for 3 weeks then it went haywire again. I found there was a break in the wiring loom which I managed a temp repair and then sold the car. The parts guy I knew at main dealers said it would be a new loom (which also covered the foglights) but these were on back order with no idea of when one would be available. He suggested an auto electrician insert new section of wires across the front; cheaper and quicker than waiting.

[Steve McF]

Well this morning I was surprised to feel heat coming from the vents when the climate was set to 25 deg C. I toggled through the SiD to find the outside temp display working again and showing 10 degrees!!!

Don't you just love intermittent faults!!!

When I put the car in to have the chain tensioners looked at I might just get them to look at some of this silly sort of stuff as well.!!!