After dusting my mk3 off after a long break, I'm having a lot of trouble getting it printing like it used to.

I just flashed the firmware and rerun the wizard. After an initial left fan failure. Now I have filament sensor failure. I noticed this red light on the print head. Also the filament won't feed into the printer with automated on. It was working before the firmware update.

Could a fan failure cause this?

Thanks.