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[SP_3.2]

I know that I have had my facelift for about 4 years or more now so odd one , But I know that the CC on the facelift is a little different from the mid facelift. Think there no sampling fan in the cabin. With mine unless it very hot and sunny out  if you set it to say 20 it warms up the car then starts to cool it down.  If you put it on low then it will cool it over ride the system and cool it right away.

Is this how its meant to work

Thank Steve

[Kevin Wood]

It's how it does work, unfortunately. I suspect, because there is no temperature sensor in the cabin, it assumes based on outside temperature that heating is required, until the sun sensor kicks in and it realises cooling is more appropriate.

Kevin

[SP_3.2]

Cool thanks kevin.

was the old mid facelift like that i recall that it had a fan.

[feeutfo]

Yes, hi flat out heat, lo flat out cold. Set a temp and it will cool or heat to reach that temp. Once achieved it will level off, so to speak.

It's like setting a temp on the stat in the house, set it to 23 and it will heat until it reaches 23 and turn off, except it does mot have the facility to cool as well. The car does and will continue to balance the hot and cold to maintain the temp the driver has set. Sun sensors are also calculated in, if the sun comes out on the drivers side,it will add a little cold.

It's not really a case of setting it to a temp. and expecting to sit in a a constant stream of heat, or cold. It's trieing to achieve the set temp "in the room" if that makes sense? Although it has dual zone.

I think possibly it's why we see so many face lift omegas with the buttons worn out, the driver constantly adjusting the controls and using it as a traditional heater, ie turn it up because it's cold then adjust the heat down once it becomes too hot.

Climate control does that automatically. But if it turns cold, or "levels off" too quick, turn the temp up. I set mine to about 23 on average and the car just sorts it out.


But having said all that, I notice a lot of members don't use the auto setting and set fan speed to a constant or what ever else, will be interesting to see what they say and why the climate fails them, suspect fan speed too strong perhaps...

..... I notice the update calms the centre top vents to no heat at all when a hot setting is used, yet on cold gives a good blast. :-/

[x1xv45]

I know that I have had my facelift for about 4 years or more now so odd one , But I know that the CC on the facelift is a little different from the mid facelift. Think there no sampling fan in the cabin. With mine unless it very hot and sunny out  if you set it to say 20 it warms up the car then starts to cool it down.  If you put it on low then it will cool it over ride the system and cool it right away.

Is this how its meant to work

Thank Steve

That describes how mine works - I was also beginning to wonder about it, so thanks for bringing it up. When the car has been sitting in the sun, but the air is cool outside, the heating up before cooling down is especially weird.

[feeutfo]

It's how it does work, unfortunately. I suspect, because there is no temperature sensor in the cabin, it assumes based on outside temperature that heating is required, until the sun sensor kicks in and it realises cooling is more appropriate.

Kevin

No temp sensor? How can it work without one?

[Kevin Wood]

As said, prefacelift cars had a sampler fan that draws air through a slot in the dashboard to sample the true temperature of the car's interior.

Facelifts don't have this although the slot is still there. From memory they use the outside temperature sensor, sun sensor and also measure the air temperature in the vents, so they set the vent temperature based on outside temperature and sun. They have no way to figure out that the interior is already way too hot after being parked in the sun.

Kevin

[Andy B]

.... the driver constantly adjusting the controls and using it as a traditional heater, ie turn it up because it's cold then adjust the heat down once it becomes too hot. .....

My Dad always used to do that in my Senator, initially turned to hot/red and then turn it down. It would never sink in that you just needed to set a desired temp & the car would then do as it was told.  :-?   

[feeutfo]

As said, prefacelift cars had a sampler fan that draws air through a slot in the dashboard to sample the true temperature of the car's interior.

Facelifts don't have this although the slot is still there. From memory they use the outside temperature sensor, sun sensor and also measure the air temperature in the vents, so they set the vent temperature based on outside temperature and sun. They have no way to figure out that the interior is already way too hot after being parked in the sun.

Kevin

I am confused, I think it works perfectly, and notice no difference between my 99 cdx, and current 03 elite, except it has a sniffer for fumes as well.....afaict anyway.


But that's why I added the bit at the bottom of my first post....does the elite have a sensor perhaps?

[SP_3.2]

Cool thanks for that all . Just had the AC system serviced and checked all ok. I think with the summer and the sun being out more, the sun sensor was kicking in from the start . Today on the way into work it was about 9c so not as warm now.

[bob.dent]

As said, prefacelift cars had a sampler fan that draws air through a slot in the dashboard to sample the true temperature of the car's interior.

Facelifts don't have this although the slot is still there. From memory they use the outside temperature sensor, sun sensor and also measure the air temperature in the vents, so they set the vent temperature based on outside temperature and sun. They have no way to figure out that the interior is already way too hot after being parked in the sun.

Kevin

Yes it's not a particularly good solution Kev, sometimes the system works well but all too often it doesn't. I often find driving to work in the morning that the outside temp can be quite cool at around 11-12 degrees C. You get nice warm air when you first start driving but as soon as the sun sensor kicks in it starts chucking out cold air. Manually turn the fan speed down and the system automatically increases it again. Drives me up the wall sometimes.

[Kevin Wood]

Yes it's not a particularly good solution Kev, sometimes the system works well but all too often it doesn't. I often find driving to work in the morning that the outside temp can be quite cool at around 11-12 degrees C. You get nice warm air when you first start driving but as soon as the sun sensor kicks in it starts chucking out cold air. Manually turn the fan speed down and the system automatically increases it again. Drives me up the wall sometimes.

There is an option which appears to calm down the automatic control of fan speed. You can set it while upgrading the climate control. Next time you're near a Tech 2 get someone to have a look and see if it's enabled.

Kevin

[henryd]

I just leave mine set at 22 deg and let it sort itself out,seems to work ok,much better than my last car(grand cherokee)