2014 Citroen C4 blower working at all speeds then nothing then it works again

Would check heater resistor and wiring

https://www.buycarparts.co.uk/blower-motor-sesistor/citroen-c4/m-denso

I got same issue, I changed new blower heater, new resistor, and then they sed the issue maybe its with AC control panel, I changed that is well same thing it's doing, I ben to the electrician the checked for 1 day they can find the issue, can somone tell me where can I send or what should I do please,
thank you.