My 06 Corrolla was Blowing warm air after the winter. I thought I had a leak. Pick up some r134a and tried to top it off. No leak?Now what?Unit was full according to my gauge.Compressor does not seem to turn on. Checked all the connections I could locate. Looked at the fuse box for an open fuse.I notice there are a couple of sensors involved in the repair section.One is an amplifier, and the other, I think was an idle up vcv sensor.Could somebody chime in on my problem? This is my first post.