Hi guys I need some help 

I have some overheating problems, fans doesn’t kick in on 90c 

i replaced the thermostat today and before i replaced it was the bottom hose from radiator cold but now are both hoses from radiator hot. 

what do u guys think the problem is? 

47 minutes ago, tbbe said:

I have some overheating problems, fans doesn’t kick in on 90c 

i replaced the thermostat today and before i replaced it was the bottom hose from radiator cold but now are both hoses from radiator hot. 

what do u guys think the problem is? 

Well, to start with the fan(s) should cut out at 90c, not cut in.

If both hoses get hot, that's "normal function".

yee the should start spin at that point

4 hours ago, Paws4Thot said:

Well, to start with the fan(s) should cut out at 90c, not cut in.

 

Absolute rubbish! Maybe you meant to say should not be operating at 90°c or should cut out when they have brought the temperature (of an overheating engine) down to 90°c, in fact due to the hysteresis of the thermoswitch it may well cut out at less than 90°c in that scenario.

 

5 hours ago, tbbe said:

I have some overheating problems, fans doesn’t kick in on 90c 

 

That is not an overheating problem unless the temperature exceeds the indicated 90°c by a significant margin, you do not say what engine your vehicle has but the temperature in both the petrol and diesel is regulated by the thermostat and the cooling fans will only cut in (aside from when the aircon is used) when the temp exceeds the thermostat rating by a significant margin, I've been driving VAG diesel engines for 25 years and dont think the cooling fans have ever once cut in through elevated coolant temperature and that includes towing massive overloaded trailers.

 

They would come on when I used the AC which was rare but now having moved further South the aircon gets a hammering for 9 months of the year so I would no longer have a warning of overheating by the fans cutting in.

Edited 18 August, 20241 yr by J.R.

its go over 90 when it just idle and when i drive i way it drops back down 

14 hours ago, tbbe said:

its go over 90 when it just idle and when i drive i way it drops back down 

Have you checked for air in your cooling system?

Edited 19 August, 20241 yr by MikeTheThinker

i have run with the cap open