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Old 5 Days Ago   #1
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Climate Control Help

Hi all,

I've noticed something very strange with my fiat 500C 2009 climate control. When the temperature is low or the air con is on at a low fan speed everything is ok and normal. However if i increase the fan speed to 2 bars from the top (so almost maximum) there is a click and really hot air comes out.

The same effect also happens If i go over a bump or the car is jolted in any way.

What this means is i cannot have my fan on high at all.

Just to clarify the air work fine, as long i keep the fan speed low.

Has anyone else seen or experienced anything like this? its really annoying on a hot summers day.

Thanks
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Old 4 Days Ago   #2
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Re: Climate Control Help

I'll take a punt and say your blend door is faulty which if it is, is, a sell the car job, let's hope not? Or the actuator has come off the end?
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Last edited by John202020; 4 Days Ago at 18:53.
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Old 4 Days Ago   #3
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Re: Climate Control Help

Welcome to the forum!

Small point .......

The Automatic Climate Control is a button you press called "Auto".
If you press it, you can alter the temperature, and the system runs automatically to achieve the set temperature.

If you press any other button, the Auto Climate Control system disables, and you are then into Manual Air Conditioning.

Our 500TA is always left in Auto. I've never seen the need to go to Manual.

Good luck,
Mick.
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Old 4 Days Ago   #4
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Re: Climate Control Help

There are motorised actuators for the air distribution and temperature control, three I think.
You will need to stand on your head under the dash, and view each one in turn and see if they move when settings are changed. This will hopefully identify if any of these are adrift or broken.

There was a recent thread where someone did a whole write-up about changing the complete heater. Have a search. Could be 500 or Panda.

These two threads are also worth a read.
http://www.fiatforum.com/panda/44931...-problems.html
http://www.fiatforum.com/panda/29799...ir-heater.html
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Old 4 Days Ago   #5
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Re: Climate Control Help

Quote Originally Posted by portland_bill View Post
There was a recent thread where someone did a whole write-up about changing the complete heater. Have a search. Could be 500 or Panda.
A main dealer repair for this will likely run 2k+. Someone did one themselves, using a secondhand heater box, with the help of a mechanic - it took them a week.

There's also an ex-fiat tech who can fix them using secondhand parts for around 600 or so (but understandably there's no guarantee).

Have a look at this thread (but be prepared for a nasty shock).

Unfortunately this is Fiat engineerng at its worst. Cheaply made, underspecified parts used in a situation where access requires a full day's fiddly, awkward work, compounded by crazily high prices for OEM replacements (you have to buy the complete heater box at almost 1000) and no aftermarket alternative.
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Last edited by jrkitching; 4 Days Ago at 08:33.
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Old 3 Days Ago   #6
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Re: Climate Control Help

My punt is based on the fact the temp fluctuates with bumps in the road etc suggesting the blend door is maybe flapping around changing the temp and being blown in one direction at high fan settings, sound plausible?
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Old 3 Days Ago   #7
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Re: Climate Control Help

Quote Originally Posted by Mick F View Post
The Automatic Climate Control is a button you press called "Auto".
...
If you press any other button, the Auto Climate Control system disables, and you are then into Manual Air Conditioning.
Not completely manual, Mick. For example, if you press the fan speed button when the system was in "Auto" mode, then temperature control stays active. So the system is still much more advanced than a manual aircon.
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Old 3 Days Ago   #8
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Re: Climate Control Help

Back on topic: You can use MultiEcuScan to look if the climate control system contains any stored errors and clear them. You might even try the "flap actuators learning" function to "recalibrate" the end stop positions of the flaps.
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Old 3 Days Ago   #9
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Re: Climate Control Help

Quote Originally Posted by Mick F View Post
Our 500TA is always left in Auto. I've never seen the need to go to Manual.
Assuming you don't mind diesel fumes.
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Old 3 Days Ago   #10
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Re: Climate Control Help

Quote Originally Posted by AGH1965 View Post
Not completely manual, Mick. For example, if you press the fan speed button when the system was in "Auto" mode, then temperature control stays active. So the system is still much more advanced than a manual aircon.
The temperature control is always active - manual or automatic.
If you touch anything other than the temp control, the system comes out of auto and is therefore manual.
Press the auto button, and all the controls become automatically controlled, but you can still alter the temp or course.


Quote Originally Posted by Mick F View Post
Our 500TA is always left in Auto. I've never seen the need to go to Manual.
Quote Originally Posted by UFI View Post
Assuming you don't mind diesel fumes.
I don't tend to sit in traffic. My sympathies if you do.

Regards,
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Old 3 Days Ago   #11
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Re: Climate Control Help

Mick, you assume there is nothing in between "auto" and "manual", but maybe there is: "semi-auto".
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Old 2 Days Ago   #12
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Re: Climate Control Help

Please explain.

There is button that lights up. Auto is the one.
Press any other button than the temperature button, and the Auto light goes out.

Therefore, am I right in saying that the opposite to automatic is manual?
One, or the other?

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Old 2 Days Ago   #13
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Re: Climate Control Help

Quote Originally Posted by Mick F View Post
Please explain.



There is button that lights up. Auto is the one.

Press any other button than the temperature button, and the Auto light goes out.



Therefore, am I right in saying that the opposite to automatic is manual?

One, or the other?



Mick.


With Auto off the temp and fan speed will still behave automatically, i.e. they will track the temp setting you've selected, the only thing that won't adjust will be the air direction. I think this has been discussed at length on previous posts iirc.
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Old 2 Days Ago   #14
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Re: Climate Control Help

I therefore think that our car works differently to others then.

If when in Auto, the vents all seem to work simultaneously. The system doesn't differentiate with air-flow out of individual vents from what I can see/feel.

They all chuck out air as the system doesn't seem to be that intelligent.

In order to alter the air-flow, we have to come out of Auto. We can physically close the upper vents of course.

As for Auto Off, I don't know, because I've never had it like that unless it's for a quick demist of the front windscreen.

Thanks,
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Last edited by Mick F; 2 Days Ago at 08:18.
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Old 2 Days Ago   #15
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Re: Climate Control Help

Quote Originally Posted by Mick F View Post
I therefore think that our car works differently to others then.

If when in Auto, the vents all seem to work simultaneously. The system doesn't differentiate with air-flow out of individual vents from what I can see/feel.

They all chuck out air as the system doesn't seem to be that intelligent.

In order to alter the air-flow, we have to come out of Auto. We can physically close the upper vents of course.

As for Auto Off, I don't know, because I've never had it like that unless it's for a quick demist of the front windscreen.

Thanks,
Mick.
In Auto, the vents should direct air to where is optimum, on mine this seems to be the footwells when heating is required and the front dash vents when cooling is needed, I'm not sure if it does a partial between the two at some point. Obviously switching out of auto and selecting a particular vent overrides this but the temp and fan speeds remain automatic (with or without compressor on)
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