Technical Climate Control [faulty fan?]

[reveds69]

Re: Heater Blower

Where abouts in the vehicle will i find the resistor pack of which you speak , Feel really stupid but i bought a air con tester yesterday that you clip onto the system and i found the system was over pressured well in the red ??? Would the heating system play up if the air con was buggered ????


Thanks Guys

 

[Deckchair5]

Re: Heater Blower

An overpressurised aircon system will prevent the aircon system from starting when you select it. The internal fan comes on at posn 1 speed (if you have the fan speed switch off) when you select air con so, when you select aircon operation. you might momentarily get internal fan go on and then switch off again when it senses a wrong system pressure. Bring the aircon system pressure down by releasing some gas from the aircon inflation valve.

Look through these videos for recharging air con system
http://www.id-usa.com/how_to_videos.asp

Wear gloves and eye protectors. Keep your hands/ face out of the way of the gas/liquid if you are depressurising


There is an electrical pressure valve at the front of the car called a linear pressure valve because it senses a too high or a too low pressure. It prevents aircon start up unless the pressure is between the two limits otherwise damage to the compressor can happen. Your air con will probably start once you get the system pressure correct

The heater fan speed resistor pack is next the heater fan

 

[reveds69]

Re: Heater Blower

Have just been to an air con spiecialist and told me i need to get the internal fan working first prior to recharging the air con itself ?

I have disconnected the connector which clips directly to the heater motor which consists of a thick black wire a thick red wire and put a test meter over the two wires and get 12v

I then put the test meter over the thick red wire and the next one along pink i think and can control the voltage showing on the test meter with the buttons on the climate control panel (fan speed i assume)

I have put the meter across the the green wire and the thick red wire and get 12v ?

I cannot get the air con snowflake to switch on and off and assume that this is down to the pressure in the system although occasionaly it will flash four to five time on start up and thats it have bought a gauge will take your advise on that link you posted

 

[Deckchair5]

Re: Heater Blower

"Have just been to an air con spiecialist and told me i need to get the internal fan working first prior to recharging the air con itself ?"
Yes. Get the basics going first

To test your circuits you need to
Test your voltages between the object and ground (earth).
Test the resistance between the earth wires and earth to be near or at zero

Testing between one wire and another won't tell you a lot but can get you into trouble if you don't know what you're testing

So look at the wiring diagram i sent you on the presvious page and work through it systematically

Check the fuse F8 see if you have power either side
check the relay, see if it clicks with ignition on
check for voltage in and out there
now check the fan voltage in and out

Now check the earth of the fan. Check the resistance between the fan out put and a good earth.

If the fan has power in and the fan output has connection to earth then the fan should obviously go

If it doesn't then the fan could be stuck (leaves etc) or the motor brushes and contacts are up the creak

Can't help you with wire colours. they are often different to the wiring diagrams unfortunately

 

[reveds69]

Re: Heater Blower

Well had a call back from the fiat dealer yesterday afternoon ,Turns out the heater motor itself is shot ,quoted me £240 including motor,fitting,and vat ,Not bad i thought ,I am having the aircon recharged and a new pressure switch fitted all in with the fan stuff £420 NOT BAD I THOUGHT I thought the dash had to come out i presume they just take the steering column out for access ??????????????

 

[Deckchair5]

Re: Heater Blower

That's good then, I think they train rabbits to get down into the recesses of the footwells to change the heater fan and they cost plenty. Can't expect any mere mortal technician on subsistence pay to be able to grub about down there

Should be back on the road in no time then

 

[reveds69]

Re: Heater Blower

To remove the heater motor you remove drivers side center consol kick panel and then tyrap the clutch pedal right back to the steel tube that is part of the brake system linkage you then undo and take out the bolt which goes through the lower universal joint on the steering column you can then slide the column up and off the splined shaft as it is telescopic and swing out of the way you then remove the three screws with a 5.5 mm socket and then carefully remove motor i have done this myself as an experiment that worked

Hope this helps someone else out


Although i still need replacement motor any ideas my fiat garage havnt a clue

 

[Deckchair5]

Re: Heater Blower

Thought about an auto electrician repairing it? Could be cheaper and quicker than waiting for a new one. I can't imagine it's worn out at that age, more likely to be lack of use. If it's wiring or brushes then it wouldn't take long at all to fix once taken apart

 

[cornetto]

my newly acquired pre-owned stilo jtd has a heater/aircon problem-it seems to have a mind of its own, switching the fan off and on at random,also the snowflake symbol, whether on a heat setting or on screen clear. Took it to fiat dealer for 84k service today, said (ominously) they would let me now price of complete replacement heater control unit. Any suggestions please

 

[StiloBoy]

If its climate control then thats what they do, maintain a set temp, switching fan speed temp etc to keep the car at a pre-set temp.... if its just standard aircon then its fritzed!

Lil Snowflake comes on if temp drops to 3' degree's outside, and stays on until it rises above 5' degree's hence why it comes on and goes off at random intervals!

 

[cornetto]

Thanks for your reply-its still driving me nuts. 3 hour drive yesterday with no heater, then 3hours on way back no problem! Its the 2 zone climate control version, and it switches on or off apparently at random when I set it at say 22 degrees. Looking at my manual I think the little snowflake on the speed is as you say the ice warning, but the one on the heater display shows when the air con compressor is on -which it seems to be at random-even when I've asked for 22 degrees! No word from the dealer-I think they will want to change the whole unit, but in my 30 years of owning cars I would have thought a loose connection more likely?

 

[frostrobo]

The snowflake symbol on the climate control display screen is simply an ice warning (like the one that somes up on the dash display), so forget about that turning on and off - its not part of your problem.

When you say the Climate Ccontrol switches off, do you mean that the Snowflake button (ie, the switch that actually turns on the air con) turns itself off after a period of time (the light goes out on it), or do you mean that after a while the fans slow down/stop then turn on again?

Depending on what mode you have your CC in, the CC will cycle on and off. If you set it to Manual or Auto it should stay constantly on. On Full Auto mode the CC will continously adjust the internal air temperature and fans, depending on the external environment conditions.

In Full Auto mode, the Snowflake button should always be illuminated. If its turning off in Full Auto mode, then it is a wiring/connection problem.

 

[cornetto]

Thanks very much for your reply. Of course its been working ok for the last few days-and i havent dared touch anything. However this morning -as it snowed overnight -nothing would come on -I tried manual, auto, full auto and demist. Although the Fan bars were showing-there was no fan. The snowflake does sometimes appear-but not necessarily when Full Auto is on. Sometimes it seems as though it comes to life and the fan comes on after a few miles. Is there anything I can do to test it to see what is happening? Brrr!

 

[leelee01]

I had the very same problem with my Stilo, In the end i had the fan unit replaced for about £204.00 as Fiat wanted nearly £800.00 to replace it, there is someone that can replacing them in Nottingham, don't know which part of the country you are in

 

[cornetto]

Thanks LeeLee, I am in Norwich, but would definitely drive to Nottingham for £600, even without a heater! Can you remember the garage, and any other details?

 

[leelee01]

Hi

Its called Neil Harrod Ltd they are at Stanton Works Bath Lane, Mansfield, Nottinghamshire, NG18 2BZ

Tel: 01623642461

Ask to speak to Simon if he is still there.

They had the car for a couple of hours and also included in the price was a new heater loom as well.

Sounds like the same problem to me were it would work for awhile then not, by the time i had it changed it wasn't working at all.

Lee

 

[cornetto]

Thanks for the info.I took mine to the fiat garage at Barford near Norwich. They fixed it with new fan and loom for around £200, but they had the car for a whole week. Apparently the part number is wrong, and eventually I suggested they ring your garage to get the right part reference. It was helpful I think to quote your cost to them too-thanks!

Hi

Its called Neil Harrod Ltd they are at Stanton Works Bath Lane, Mansfield, Nottinghamshire, NG18 2BZ

Tel: 01623642461

Ask to speak to Simon if he is still there.

They had the car for a couple of hours and also included in the price was a new heater loom as well.

Sounds like the same problem to me were it would work for awhile then not, by the time i had it changed it wasn't working at all.

Lee

 

[Andrew S]

Stilo Heater Fan 1.6 MW

Help can any of you guys tell me how to remove the heater fan from my Stilo 1.6 Dynamic MW, I have got it off the housing but can not get it passed the steering and pedals. How much has to be removed to get the dam thing out? My wife is freezing in the car in this cold weather! must get it fixed this weekend!!
Thanks for any pointers

Rgds Andrew

 

[Deckchair5]

Re: Stilo Heater Fan 1.6 MW

It's one of those jobs that's more difficult because the Stilo was designed as a LH drive car so the clutch pedal and steering get in the way. You can get access by using some strong wire or a strong tie wrap to keep the clutch pedal down

and then release the steering column lower universal joint by taking out the bolt and then pull back the steering column tube, as it's a sliding/ extending tube, out of the way.

Then you can remove the fan 3 screws and manouevre it out

FOOD FOR THOUGHT
It's a very expensive item and it's just a 12v fan after all. My fan is on almost all the time and at 55k miles is absolutely fine. My Bravo, on 108k miles has the same set up and the fan on that is on almost constantly too so there's probably not much wrong with it and almost definitely it won't be "worn out". So if you're curious and maybe have some basic electrical knowledge, a strip down of the unit is what I would do and see what's wrong. It may just be stuck or have poor electrical contact somewhere internally

Check it for resistance, should be almost zero. If not then it's open circuit. See if the fan rotates by hand. Stick 12volts on it and give it a spin. See if the commutator just needs cleaning

 

[Andrew S]

Re: Stilo Heater Fan 1.6 MW

Many thanks for the tips on fan removal, i think the problem with the fan is the speed control, which I think is built in to the fan itself. There are 4 wires conected to the fan two which have 12v on them when the ignition is turned on (even if the fan is not required to run) and the other two smaller wires carry data to the internal speed controler from the climate control. Have found a half price genuine replacment on e-bay.

Thanks again
Andrew