Hi, I've been having an issue with my 2004 XC90 T6 AWD. The A/C blower fan has been working intermittently. I ordered a new fan, but after doing some troubleshooting with the help of a tech on Just Answer, I realized that the fan is fine. Sometimes the
fan speed will change without me turning the dial. Sometimes I will drive to a place with the A/C blower fan working and park, but when I return to the vehicle and start it, the A/C kicks in but the blower fan doesn't turn on. I figured that maybe the climate
control module on the dashboard was defective, but sometimes the entire dashboard will die while I'm driving, or it may go on and off several times. If it stays off, once I turn the engine
off and turn it back on, then everything comes back to life. Also,
if it stays off, my turn signals, power windows and door locks do not work. I have to turn off the vehicle, remove the key and then turn it back on and everything starts to work again.