Hello

 

first sorry for my english, i am having hard time finding some of the appropriate words to use here. Thanks for patience.

I have a problem with setting air temperature on my Octavia II 2009. I have Climatic heater unit and the temperature is not changing continuously as i rotate the temp knob on the left. According to how it behaves i believe that the air conditioning system is OK - i mean the compressor and amount of medium inside the system are OK. Problem might be the ambient temp sensor or the onboard unit or something else.

 

If i set lowest or highest temp then they are set (lowest/highest settings are not regulated as far as i know but its full ON cooling or heating) and air temp is according to lowest/highest as set. But between them as i turn the knob the temp is not regulated continuously. sometimes temp is the same after turning a lot on the knob then suddenly starts changing. So the regulation is not completely OFF between lowest/highest but its regulating to some poor degree (if it was completely OFF then i could assume ambient air temp sensor is bad).

 

What could be wrong? still have to check ambient air sensor? what about the climatic unit? are there some contacts on PCB that need to be cleaned?

 

 

Second question is: does anybody have manual or could anybody explain how do i reassemble the heat knob to its correct position? Problem is that i wanted to take apart the climatic unit (to see if there are any contacts to clean around the potentionmeter) and pulled off the knob in the center (see photo). I thought that the potentionmeter has a stop mechanism at lowest/highest turn because if the knob is attached then it has. but i have realized that without the knob it can be turned around infinitely (just turning the potentionmeter only to the right the temp is changing between cool/warm). So now i have lost the position where the potentionmeter should be when i attach the knob. The knob has a thin cut and the potentionmeter a small "jump" so i assume one fit inside the other but i dont know where should the potentionmeter be set when i attach the knob. Because if i just attach the knob blindly then the knob might be pointing to low temp when warm air is coming and that not good. I can only experiment by feeling the air temperature coming from the vents and attach the knob accordingly but since its not regulating correctly its very hard to experiment. A definitive quide would be straightforward.

 

Thank you for your help

I had Climatronic on the last 2 vehicles and have the cheaper Climatic on this one, I don't believe it regulates the cabin temperature like the Climatronic one does and that the temperature control is no more than a heat output setting like on an old school heater with a water control valve, as such for a given setting the temperature goes up and down dependant on engine coolant temperature, outside temperature and wind chill.

 

I always have to tweak it up and down on a journey in the same way that I used to have to on older vehicles.

 

The above is simply my belief from experience, it could be designed to regulate the temperature in which case it either does a poor job compared to the Climatronic or mine has a fault like yours.

 

I know from having replaced the dashboard that it lacks many of the temperature sensors that the Climatronic system has.

Looking at your photo I see that your knob has markings for temperature, mine doesnt, just red and blue hot and cold icons.

It's climatic, the signs of temp values means the air is continuously adjusted to the setting left.

The other settings are all manual.