I am unsure if my car has a fault, it may not do however I'm keen to find out!

When I use the Air con I assume the radiator fan would automatically come on? This appears to be the case with many cars on the road.

My radiator fan never comes on when the Ac is on. Is this normal?

My car is the 1.4 pd tdi.

The Radiator fan or fans for the Coolant Radiator may come on if the coolant is above about 90*oC to cool the coolant system which cools the Engine / Oil.

The A/C being on should not have any effect on making the Radiator Fan come on other than you are maybe using the A/C on hotter days, 

and the cars coolant / engine is working at a higher temp.

 

Forgetting the A/C bit, does the Radiator Fan ever come on if its hot, the engine is hot and you stop and the coolant temperature 

is rising?

I have owned the car for 3 years and have never heard or seen the radiator fan running. I assumed by car had two fans, one for the ac and one as the main radiator fan. Off to check now.

The 1.4tdi does not have a temperature gauge, only a Coolant temp light. The light has never come on to indicate that the engine is hot therefore perhaps this is why I have never heard the fan running.

I thought the fan (one of them if there are two) should run to assist the ac.

I have checked, there is only one fan. Checked the fuse box below the steering wheel and all fuses seem ok.

There are 4 or 5 other fuses ontop of the battery which I am not sure if any are related to the ac system. I have not taken them out to check, will it be OK to pull them out and check? Anyone know what they relate to?

Why are you messing around, is there no A/C and you need a Service & Re-gas or is your concern 'The Radiator Fan'

The Cars Engine Coolant System and Radiator?

(has you coolant strength ever been checked etc,  Coolant System. Heater,  A/C System seperate things, best do not mess with it.

Best not to go pulling Fuses if you have a car that runs OK, and a Heater & A/C that works OK. IMO)

 

If the Red too hot warning light was showing this might be because the Radiator Coolant fan was not coming on when it should or some other fault.

You might hear the Radiator Fan come on as you stop, but there is no need to hear it at higher speeds, maybe crawling in traffic when its hot you might hear it come on.

 

Does your A/C work OK, do you have a Fan blowing into the Cabin OK.?

 

PS

I said 'Fans' earlier because different Fabias have different systems, like some have 2 radiator fans, 

then the A/C or Gearbox fans or Radiators,

Your car has a basic Fan on the Radiator and a Switch that switches it on if the coolant temp gets high, 

and stays on until the temp is down near 90*oC if necessary because you are not getting cooling air through the radiator from driving forwards.

My concern is the radiator fan having never heard it. All past cars I have owned the rad ran worked automatically when the AC was turned on (low speed fan).

I had only pulled one fuse inside the car, assuming it was related to the ac. It may just have been the blower fuse as it was OK.

I assume this car is different in that the fan will not come on, but did think this may have explained why the Ac is not great. The Ac was serviced and re-gassed a month ago and is alot cooler now.

When it was serviced it had not lost any of the old gas, still had 500 grams(?) as it came out of the factory with. Just seems to be 'cool' not cold, unless your moving along nicely. I assumed the fan would help at sub 30mph speeds.

Yes moving along cools a Radiator, and if it is not cooling Radiators have a Fan / Fans.

Some in Front that push air through, and some that Suck the Air from Behind.

 

But there is an efficient operating temperature for engines / Oil.

So when you start a cold engine the Thermostat Stays Closed and the Engine Coolant get up to temp then the Oil.

Then the thermostat opens and lets the Coolant Flow through the System including the Radiator,

The radiator through Air Flow cools the Coolant Fluid, Coolant cools the Oil, the Oil is also a Coolant as well as a lubricant.

 

If the Coolant gets Hot, the Radiator Fan kicks in and draws air through (or pushes with a Front Fan).

But you do not want the coolant or the Oil too cool.

(why in Winter some people put a Shield / Cover / Board / Cardboard in front of the Radiator.)

 

Its just how they are.

With A/C  that is another matter.  The things are connected, but different systems.

 

PS

In cold weather but above 4*oC the A/C will work, 

but the Coolant might get to 88*oC and the Oil to 80*oC but you would not want or need a Radiator Cooling fan switching on.

The reason being the Coolant is at the Operating Temperature and so is the Oil.

Have a look under your bonnet, to see whether or not you have a fan control module hanging off the nearside chassis leg, close to where the bottom rad hose connects to the radiator. 

 

If you do have one of these, it can set your fan in motion, at either speed, via the radiator thermoswitch information or in response to requests from the A/C controller.

 

Try spinning the fan by hand, with engine off and cold, feeling for any reluctance to turning. If it's stiff to turn, that may have taken out a fuse that stops the low speed working.

 

Battery box fuses are described on page 219 of your owners manual. Fuses 6, 9 and 10 are fan-related, No.9 - a 30A blade fuse under a cover on the left - will probably be the low speed one. 

Thank you for your reply.

The fan is easily spun and not stiff to turn etc. I will check tomorrow if there is a fan control module and check the fuses.

If someone with a 1.4tdi can let me know how theirs behaves that would be great!

I've got a 1.2tsi so I realise there are differences. I can't recall hearing my fan working, I've never had the temp light come on either. I just figure that 'if it ain't broke, don't fix it' maybe that's naïve of me but that thinking has always served me well.

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Fuses 8 and 10 to the side of the battery are radiator fan related, these are fine.

I do have a fan control module located under the battery tray. I would assume that the radiator fan has separate speeds purely for engine cooling (not related to ac).

Does anyone with a fabia recall the fan coming on when the Ac is started/I'm slow moving traffic or stationary?

Bit of a result. Radiator fan now fixed and it does run alongside the ac on slow speed.

The radiator fan should therefore run with the ac

What was needed to fix it?

The fan is quiet and cant really be heard very well from in the car.

If you leave it ticking over for a while it will come on, especially in the summer months.

Edited 23 August, 201510 yr by fabiamk2SE

Hi , i am facing the same issue in Skoda Fabia mk II, fan doesn't turn on when the ac is switched on , @storm blue 2could you plz tell me how did you fix the issue on your Fabia ??