Hi.

Just had an aircon service performed on my car, and thought that would solve my issue.

But I find that the air is not as tempered as I would like and have experienced in other cars.

Normally I just set the climate on auto and 21 degrees and it's great for most cases.

But I find myself dialing the temperature a lot in the Bravo depending on the weather and wondered if it could be the "solar sensor" at fault?

Furthermore when I turn the climate off I hear a buzzing sound from the bottom of the dash, could it be connected with that? I've had the panel off for change of the pollen filter, and saw that the motor "jerks" shut and open in the same pace as the buzzing sound I hear there when the climate control is turned off.

I know these cars have a not very interesting tendency to ruin the arms controlling the flaps and other things.

But when I read other issues it's more that it blows hot air until they set it on "LO", I find that the temperature in my cabin changes when I with the temperature, most times I just find it way too hot on 21 degrees.

Looking forward to clarification.

I assume you have dualzone climate control, right? Then use a thermometer and check temperature of thr air at vent holes. You can also calibrate the flaps somehow (I'm sure, you can find how-to).
There also may be an electrical issue - faulty pressure sensor, clutch switch...
or mechanical - faulty compressor or its clutch, pressure regulator ...

First, '21' is a number, not a temperature. I'll explain. You set '21'. The car will use its sensors to try to achieve what it thinks is '21', which may be a little more or less. Comfortable in this car may be '20', or '19', and may be '23' in something else.

Inside temp sensor is probably full of dust/fluff. Somewhere on the fascia will be a small grille. This sucks air in to measure the temperature. It also sucks in all airborne dust, so gently clogs itsels and struggles to measure temperature. When I got my Panda, temp control was slow to respond. A gentle run across with the vacuum cleaner and all has been well, for 10 years now. Don't poke the brush, or anything else into the grille.

The flap motor seems to be struggling. The flap is likely to have felt or foam seals on its edges, and these are becoming tight. Could be damp, or just age deterioration. Sadly, lubrication is probably a bad idea, as it will attract dust, so will only work for a short time. Proper cure will be to dismantle the heater unit. Ouch!

You could try the climate control reset procedure as follows:

1. Switch the ignition on with the key and within 40 seconds press the AUTO and MONO buttons simultaneously and keep them pressed.

2. After a few seconds a figure will appear in the left temperature display and decrease from 05 to 00 indicating the remaining time before the start of the procedure (keep the AUTO and MONO BUTTONS PRESSED).

3. When the left temperature reaches the value (00), releasing the auto and mono buttons will initiate the procedure lasting about 40 seconds.

4. Entering into local fault diagnosis, at the end of the procedure, the right temperature may display the following values:

00 = SELF-LEARNING taken place with OK outcome
01 and flashing = SELF-LEARNING taken place with not OK outcome
02 = SELF-LEARNING in progress
03 and flashing = SELF-LEARNING not completed

The procedure does not take place if the AUTO and/or MONO buttons are released before the left temperature reaches zero.

The control unit makes the left temperature flash if the self-learning has not been carried out or if the result is not positive.
.

I'll try the self learning procedure tomorrow, thanks.

I seem to have noticed that the dash vents blows hotter air than the rear passenger vent...

FrederikN said:

I'll try the self learning procedure tomorrow, thanks.

I seem to have noticed that the dash vents blows hotter air than the rear passenger vent...

Click to expand...

Possibly just cooling during its longer journey.

Not quite sure I understand what you mean?

In my opinion there shouldn't be a difference

FrederikN said:

Not quite sure I understand what you mean?

In my opinion there shouldn't be a difference

Click to expand...

The heater unit is under the dash. The air supplied to the rear of the car has to travel further, and until the whole car is equally warm, may suffer more heat loss before it escapes from the vent.

portland_bill said:

The heater unit is under the dash. The air supplied to the rear of the car has to travel further, and until the whole car is equally warm, may suffer more heat loss before it escapes from the vent.

Click to expand...

Yes, but I'm looking to cool the cabin these days not heat it up. There's plenty warm in the car because of the sun and since it's black

FrederikN said:

I'll try the self learning procedure tomorrow, thanks.

I seem to have noticed that the dash vents blows hotter air than the rear passenger vent...

Click to expand...

FrederikN said:

Yes, but I'm looking to cool the cabin these days not heat it up. There's plenty warm in the car because of the sun and since it's black

Click to expand...

OK.
Your reference to 'hotter' suggested you were looking for hot air.

The dash gets direct sun through the windscreen. This heats up not just the dash top, but the vent pipes inside. The pipes to the rear footwells are further from the sun, and get less direct sunlight, so take longer to warm up. When you return to the car, it is likely that the rear vent pipes are at a lower temperature that the dash vent pipes.

When you turn on the aircon to cool the car, whilst the air gets cooled inside the heater unit, it then gains heat from the pipes on its way to the vents. The air to the rear gains less due to the pipes being cooler.

Like when heating, the rear air will take longer to warm up, when cooling, the dash vents will take longer to cool, having been heated more. Until the whole car reaches the same temp, unlikely unless it gets parked out of the sun for some time, the air will be different from different vents.

When first returning to the car, greater cooling can be achieved by running it on recirculate for up to 10 minutes. It is not recommended to run longer than this, as you'll be using up the available oxygen.

Thanks for your support, i'll keep an eye on it for the next couple of weeks to see how it behaves. It seems to be a lot better after i tried with the self learning procedure

A big problem with Fiat’s is there poor insulation which means they heat up very quickly in the sun and cool down very quickly in cold weather. This can leads to the climate control struggling to keep up in warmer or colder weather compared to other cars.