The A/C blower motor remains on after the climate controller Off button is pressed

Question: I have a 1994 Buick Park Avenue Ultra. The A/C blower motor remains on after the climate controller Off button is pressed. It also remains on after the ignition switch is turned off. Please advise as to what the problem is. Answer: Your problem is very common and is either a faulty blower relay or a blower fan control module. I would replace the relay first as it would be the easiest and most cost effective diagnosis. If my memory serves me correct the relay is near the firewall under the hood it should be marked on the cover. Check that first. You could switch it out with another relay under the hood and see if it fixes it.