sf8752

Hi all does the main engine fan come on when you turn the air con on on a mk4 mondeo diesel mine does not and dont think air con is working

Brendan

iTrader: (1)

Does the fan switch on and work normally (to cool engine)?

can you hear the pump engage when the a/c button is pressed? lots of a/c systems will not engage the pump if low on fluid!

martysmartie

iTrader: (1)

It should do yes, as said I bet it's low on gas, hence the compressor is not actually running, you should be able to 'feel' it on the engine, as well as the air obviously, when it is working.

Martin

RichieST

iTrader: (2)

Sounds like it needs a re-gas. The fan on my focus runs quite slowly with the A/C on so you can barely hear it, the fan on my mk3 mondeo sounds like a 747 taking off though lol

sf8752

Have tried running engine on tick over for 30 mins but fan does not kick in and temp guage stays between 1/2 and 3/4

RichieST

iTrader: (2)

Sounds like it might be overheating then, the temperature gauge on the dash should never read over half way. Fans can sieze or get things stuck in them, check it can actually rotate by spinning it (with the engine off obviously).

redturboessex

Hello, I have recently got my hands of a fiesta turbo mk3, its runs quite hot all the time. Is this normal for the age of car etc???

Brendan

iTrader: (1)

ok, Fiesta Turbo running hot? I need some questions answered to give you a meaningful answer!

does the fan ever come on?

how does it run if only doing between 60 an 70 down the motorway late at night or very early morning?

Is is running standard (130bhp),has it has a t3 conversion?

They do run a little hot as standard, it is a big engine for the size of under bonnet space! and it is turbocharged!

Also has the cooling system been looked at in the last 5 years ?

redturboessex

Hey, it runs alright on the motor way, sitting about mid temp on gauge, I am lead to believe its standard bhp, (the bloke I brought of wasn't that helpful)

I have changed the cooling fluid n looks alright, no cracks or leaks. Just mainly when sitting in traffic of town driving it gets hotter..

martysmartie

iTrader: (1)

You need to answer the above, i.e. does the fan run? If not then this will be causing the problem you describe here.

OP, when you say you had it idling, was that from a cold start?

Check what has been said as well as the fan fuse, but back to the original question you will know if the A/C is working or not, regardless of the fan?

Martin

redturboessex

hello yes the fan works and runs, i've not had it long, but when driving around in the heat in n around town, slow driving, stop n starting all time is when it gets hot

martysmartie

iTrader: (1)

It will obviously get hotter in traffic, due to no air airflow, but then the fan should cool this down, which is probably is doing to a degree (pardon the pun)?

Maybe an uprated fan would help, but as long as it's not actually overheating.

Martin

redturboessex

ok, I may sound stupid (but please remember I'm new to this.. hehe) the fan is at the front of the car, in front of the inner cooler. As I have been looking around on other models, the inner cooler is at the front with fan behind. Will this make much of a difference...

really appreciate all and any help...

sf8752

Hi richi the fan moves freely

Brendan

iTrader: (1)

on fiesta's there is a know problem with the fan! you need to check the relay and the fuse! the normal givaway for this problem is that the reverse light doesn't work either!

The relay in question is the GREEN one!

I have used water wetter and found that helps (makes the cooling system more efficient).

Also check the thermostat is working properly, and it is the correct one.

My toy is a bit over cooled now! so I don't normally have to worry about that anymore!

sf8752

Another problem today esp light came on and car went into limp mode turned ignition off and fault went any ideas