salty_dog_68

I was driving to work the other day and, while sitting at a stop light, I smelled some burning plastic and my HVAC Blower suddenly revved up. Now it wont turn off unless I pull the fuse or disconnect the battery. I replaced both the blower motor control resistor and the blower motor. Neither resolved the issue. I am at a loss where to look next. Climate control panel seems to operate normally. Obviously it is a short in a switch or fuse or something. Any ideas what else could have "blown out"(a relay or something)? Thanks in advance, ep