Fuel gauge problem

Hi,

I’m Skoda Karoq owner. About a month ago I came to a gas filling station (fuel gauge arrow was in the red sector and the amber LED was lit). I filled the tank FULL but when I started the engine I was very surprised seeing that the readings of the fuel gauge didn’t change.

I contacted the service, they checked the car, ordered and replaced the gas tank float – it didn’t help.

The next step: they ordered a new instrument cluster from Czech Republic and after three weeks of waiting replaced the unit. Than the problem seemed to be solved!

Because of the Corona pandemic I work from home and don’t drive every day. It took about a month to empty the fuel tank. Yesterday I again filled tank FULL and… again the fuel gauge arrow remained just in the same position it was before: on the border of the red and white sectors. Then after my 20 km trip the fuel gauge started to change it’s readings very-very slowly (almost imperceptible to the eye) and after the next 30 km it showed half tank.

Now I’m sure the problem is caused not by the gas tank float and the instrument cluster – there should be something else. I don’t believe in the service electrician skills and need help.

Maybe someone faced a similar problem?