Hi Seragus, welcome to the forum. A question, what do you call temperature bulb? to the thermocontact that is curled at the radiator or the thermor resistance in the cylinder head?
I tell you, with the exception of Fiat in the quinquecento and seicanto, normally the electro lights it a thermocontact that is threaded on the side of the radiator, the thermocontact usually has a margin of 10ºC that is, jumps to 102ºC by ex and for at 92ºC.
To check the operation of the latter, it is very simple, you put the contact to the car, remove the terminals at thermocontact and the bridges, it is not necessary for the car to be hot, it is even better that it is cold so as not to burn and eye because the fan is going to start and can catch you!
If the electro starts, or makes the attempt, you separate the terminals and the fan must stop rotating at the time.
If the fan continues to turn after the terminals have separated, it is because the electro -ventilator relay has been stuck. Replace the relay and case resolved.
The relay I do not know where it is located, but because of the noise when you act you can find it easily.
Once you have checked the operation of the electrical installation, you only have to verify that the electro jumps by temperature and for that what you should do is leave it for a while going until the engine is heated. If the needle rises more than 2/3 of the clock and does not jump, for the engine and put the heating to cool. Next, when it is completely cold, the radiator thermocontact is changed to a new one.
Greetings and hopefully I don't give you much war!
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