Heat Problem – ALWAYS

Hi, so most people know my problem already ^^ My Punto always runs hot according to the display. It goes up to max. 1 line before red. The temperature rises then NOT ONLY, as soon as you use the electrics, e.g. light, ventilation, electric window lifter etc. and goes down immediately, as soon as you turn it off. Heat comes after approx. 25 minutes. The plant has now replaced thermostat, cylinder head seal and water pump. New Kühflusigkeit etc. The fan also starts. Nevertheless the Pr oblem. What can this be now??? Cooler possibly clogged by oil (zkd was burned)? That’s all I can think of.