Hello Oricals, happy new year all. 

Odd one this. Came out the front door this morning to find the radiator cooling fan running full tilt. It only stopped once I'd unplugged it. 

While this is not to drastic in the winter, l will need it when the warmer weather arrives. 

Anyone know why this should happen and what l can do to fix it? Relay perhaps? 

Grateful for any help and advice. 

The car is a 1998 Felicia Fun. 

Thanks all. 

doesnit have AC? If not, then it's probably faulty thermal switch on the radiator.

I think the thermoswitch has fused it's contacts 

If it's a signed speed a 5 euro part easily replaceable with a 29mm socket and ratchet. 

But unplug the battery to avoid shorting the feed cable. 

23 hours ago, funboy said:

Relay perhaps? 

 

Mine is under the strut bar, below that black cap (on the passengers side).

 

12 hours ago, Thefeliciahacker said:

with a 29mm socket and ratchet.

 

I think it's 22mm.

1 hour ago, D.FYLAKTOS said:

22mm

Nooo  29 or 30

 

I have never used 30mm wrench in car repairs (i have changed my  thermoswitch in the past) because i never need to bought one.

Update: Yes it's 29mm, i just check it.

Edited 13 January, 20233 yr by D.FYLAKTOS

On 12/01/2023 at 17:13, Papez said:

doesnit have AC? If not, then it's probably faulty thermal switch on the radiator.

No AC.

On 12/01/2023 at 20:02, Thefeliciahacker said:

I think the thermoswitch has fused it's contacts 

If it's a signed speed a 5 euro part easily replaceable with a 29mm socket and ratchet. 

But unplug the battery to avoid shorting the feed cable. 

Do you know the part number of the switch please? 

3 hours ago, funboy said:

Do you know the part number of the switch please

just buy a generic one dont bother with part numbers, find one in a temperature range you like and be done for

On 14/01/2023 at 16:35, funboy said:

the part number of the switch

 

6U0959481A

 

Depends from the country that you living (climate)

Here mainly we use 80-85 'C (some with older cars in traffic areas use 75-80 'C ) ,if you live in a colder place then 85-90 'C etc

 

An example from the well know Mahle

https://www.trodo.com/temperature-switch-radiator-fan-mahle-original-tsw-4d

On 15/01/2023 at 22:18, D.FYLAKTOS said:

80-85

at what point of the gauge does your fan initiate?

The first time:

One click above 90 'C ( must be 91-92) and works for few seconds, less than a minute.