Just bought a 2.0TDI Octy II Elegance Estate, 06 plate, 20k miles.

Very pleased, nice car, but the temperature sensors on the climatronic A/C appear to be wrongly calibrated. The A/C works, as does the heating, and the temperature sensors appear to regulate the temperature inside the cab. Unfortunately they regulate the cab temperature at something like 6C to 10C degrees above the temperature set by the occupant on the dual zone temperature dials. On a warm day if 16C, for example, is set on both controllers the cab temperature settles down at about 25C. If set at 26C it finally settles inside at about 33C. I measured all cab inside temperatures in various spots with an accurate separate independent thermometer. The sensors "think" it's a lot colder in the car interior than it really is.

Dealer diagnostics would naturally show the sensors working (as they indeed are), but would they list the temperature the sensors are recording?

Where are the sensors located, other than the one in the centre of the fan speed button? Maybe I could get the wife to blow hot air on them to fool them.

More seriously, can the sensors be re-calibrated electronically without physically changing them?

Any enlightenment would be much appreciated.

Anyone know how I obtain the key to the Octavia cllimatronic codes that display on the two LCDs? I've read related posts but see no match for codes that show up in blocks 0 - 31 with subsections between 1 & 12 (nearly 150 codes in total). No longer available on eBay. I'm keen to check for myself on what the dealer says.

My climatronic problem remains. The dealer ran diagnostics but said there is no malfunction. This did not raise confidence as we talked in a car with A/C blowing away, climatronic dials set to 16C, outside temp 13C, while inside temp climbed to 23C (on 2 thermometers), and it was said this was normal for the model!! I was told the 2 climatronic LCD displays were to set the blower air temp only, nothing to do with the cabin inside temp, there was only 1 temperature sensor (this in a dual zone car!), he was unaware there was a sunlight compensation sensor, and surprised that the climatronic LCDs could display codes. It's under warranty but I assume he cannot recover costs from manufacturer if diagnostics show nothing really unusual.

It does sound strange, but the description of what he said sounds like he was trying to avoid working the problem.

The temperature displayed is not the airflow temp, but is indeed the cabin temp. If you stuck a thermometer in the airflow it will be way colder than the temp set.

I would think some kind of sensor problem, but its not bad enough to trigger a fault code because the readings its giving are still within the operating range.

Anyone know how I obtain the key to the Octavia cllimatronic codes that display on the two LCDs? I've read related posts but see no match for codes that show up in blocks 0 - 31 with subsections between 1 & 12 (nearly 150 codes in total).

http://briskoda.net/octavia-ii/new-octavia-tips-tricks/55750/

My climatronic problem remains. The dealer ran diagnostics but said there is no malfunction. This did not raise confidence as we talked in a car with A/C blowing away, climatronic dials set to 16C, outside temp 13C, while inside temp climbed to 23C (on 2 thermometers), and it was said this was normal for the model!! I was told the 2 climatronic LCD displays were to set the blower air temp only, nothing to do with the cabin inside temp, there was only 1 temperature sensor (this in a dual zone car!), he was unaware there was a sunlight compensation sensor, and surprised that the climatronic LCDs could display codes. It's under warranty but I assume he cannot recover costs from manufacturer if diagnostics show nothing really unusual.

Your AC is not good. If it's sensor or something else, I don't know but the dealer must know. Now the summer is on the end and it'll be difficult to get it solved because you won't be able to demonstrate the error easily. Anyway, it has to be solved by your dealer. Once I had Toyota Avensis and alarm was going off during a night. I went to the dealer and they told me it was normal because I didn't know how to use alarm. I said: "Sorry???". They said I had to wait until cabil light switch off and just then lock the car. They think that their clients are so dumb that thay can tell them such stories. My problem was solved by leaving the car at the dealer and I told them: "Here is the car. Give me a call when it's done. If not solved in 24 hours I'll come to pick courtesy car as it was my right..." They changed alarm in less then 24 hours.

Then, there is always another dealer...

Temperature sensor is located in the middle of the middle fob on AC controls. You can easily see it. If receptionist can't see the problem, ask to talk with mechanic who works on AC. If he can't see the problem, ask for garage chief. Then, on the hot day, put him in the car and take im for a ride. Put the temperature on 22c. That temperature should be very nice on the hot day. Let the ride last long. You'll start to sweat but garage chief will as well. Let him sweat untill he says: "Oh yeah, I can see the problem now..."