1.8er 115 HP does not start sporadic! Who can help?

Hello I have a 97er 1.8 liter/ 115 hp Escort. The following phenomenon turns out to me 🙂 : car is in the shade, everything is good. starts wonderfully and runs round. car is standing for a long time in the sun without the engine already on before was so e.g. around noon and car was parked the day before. car does not start the first time at all, feels like a diesel has not glowed long enough. In the second attempt, everything works wonderful. in? Second problem: Suppose I turn the ignition, lights up everything that needs to light up. A quiet buzz can be heard briefly from the cockpit, which shuts down after about 1.5 sec. (petrol pump?). When the ventilation is on, I hear this too. Now to the problem: If I turn the ignition on another day again, everything lights up in the cockpit as it should, but the ventilation does not work, a short buzz from the cockpit is not to be heard and when the ignition is turned, nothing happens. No starter, ga r nothing! Lighting in the cockpit doesn’t go off. I do that about three, four times. Pull the key (there is only the red key) out of the ignition lock and at some point it works. So it’s not possible to reproduce! Maybe someone has an idea? Would be very grateful.