[Bizzybo]

The first thing to check is the coolant level. If this is low it will not circulate through the thermal valve. If the coolant is full and there is no air in the system, you need to check for coolant flow through the thermal valve. The valve is located on the front of the intake manifold and is the valve towards the drivers side. With the engine warm, check the temperature of both hoses at the thermal valve and the idle control motor (next to thermal valve). If the coolant is flowing normally both hoses will be hot. Once you have established proper flow, then you can go further with diagnosing the thermal valve and idle control motor. Normally you will find the problem is with flow or the lack of flow.