Technical aircon problem cooling fan won't start

[snaipaz]

Hi,
I searched the forum but i didn't find the fix... when i start the aircon it blows cool air for just a few minutes than it blows air at outside temperature. If i turn it off and wait a few minutes and then turn it on again the same... cold air only for a few minutes.
I looked under the bonnet and the cooling fan doesn't start with the aircon switched on, can anyone tell me how can i solve this problem???
Many thanks.

 

[A3jeroen]

Are you sure you have enough refrigerant?

gr J

 

[sixpotman]

Does the centre part of the compressor
pulley turn (does the magnetic clutch kick in)
and continue to run.

Check the alloy aircon pipe where it goes from the
compressor down to the bottom of the condensor radiator
if there's oil there the alloy pipe could be cracked.

John

 

[john55]

either low refrigerant or moisture in the system (which freezes after running for a while).
Get a air-con specialist to check it.

 

[minimad99]

I had a similar problem on my JTD a few years ago and solved it eventually by replacing the rad fan control unit. My fan also wouldn't kick in when aircon switched on.
Have a read of this thread from post number 85 onwards as it could be numerous things before the unit needs replacing.

https://www.fiatforum.com/stilo/11939-aircon-broken-pipe-6.html

Neil

 

[snaipaz]

I might be lucky... i interchanged the relays and one of them burned out and it made the heater fan stop working, i'll see if this was causing my problem and let you know...
Thank for the quick replays everyone.

 

[Most Easterly Pandas]

fan on mine dosen't always kick in as soon as aircon is started. Aircon works fine, but fan kicks in only when it feels like it. It this normal or should it be on constantly

Jon.

 

[Greggers]

It should kick in as soon as the air-con is turned on but it's unlikely you'll actually hear it. It runs at a much reduced speed and you'll have to get your head in there to see it turning

 

[Most Easterly Pandas]

It should kick in as soon as the air-con is turned on but it's unlikely you'll actually hear it. It runs at a much reduced speed and you'll have to get your head in there to see it turning

Mine deffinatly don't go all the time. Stuck head under and checked. Turn aircon on, and compressor kicks in, but fan only intermitantly.

Aircon seems to work fine (nice and cold inside the car).

Car's still under warrenty, and needs to go back for some other bits. Do I need to add this to the list?

Jon.

 

[Greggers]

As long as it does come on when required, I shouldn't worry too much about it

 

[minimad99]

It should come on intermitantly to draw air across the condensor, you can use aircon without a working fan when driving at speed but you will damage the system if you sit stationary without a working fan. (This is what I was told by an aircon engineer anyway)

 

[Most Easterly Pandas]

It should come on intermitantly to draw air across the condensor, you can use aircon without a working fan when driving at speed but you will damage the system if you sit stationary without a working fan. (This is what I was told by an aircon engineer anyway)

Thats ok then as mine goes on intermitantly. So condenser is the 2nd rad isn't it? Is that what sometimes drips water when the car is left parked up?

 

[Greggers]

I wouldn't have though that you'd get water drip off the condensor... if anything, it would drip off the evaporator in the cabin, wouldn't it? It'd be caused by the water vapour in the air condensing on the cold evaporator, in a similar way to you getting water condensing on the inside of windows when it's winter.

I'll be honest, that sounds more like a rad leak as they're located next to each other...

 

[Most Easterly Pandas]

I wouldn't have though that you'd get water drip off the condensor... if anything, it would drip off the evaporator in the cabin, wouldn't it? It'd be caused by the water vapour in the air condensing on the cold evaporator, in a similar way to you getting water condensing on the inside of windows when it's winter.

I'll be honest, that sounds more like a rad leak as they're located next to each other...

It's ok. I haven't got any water leaking, lol, just wondered where it would come from on the Stilo, as some cars do often have the water drip off of the aircon units. lol.

 

[Morty Mort]

It's ok. I haven't got any water leaking, lol, just wondered where it would come from on the Stilo, as some cars do often have the water drip off of the aircon units. lol.

The Stilo does too. I don't recall where it comes from though, as mine isn't working at the moment. But when it works, it drips from underneath somewhere. It's plain water... condense.

 

[Greggers]

If it's to do with the aircon, it can only come from either the drip pipe off the evaporator (can sometimes get blocked causing a minor swimming pool in a footwell ) or come off of the low pressure pipe that comes from the evaporator to the compressor, those are the only places I can think off where you would get condensation forming

Like you say though, dripping water is normal from aircon cars... as long as it's dripping in the right place