So I'm looking for some help with someone who understands the chevy electric system. About 2 years ago my Suburban started blowing hot air out of the ac. It was very spastic and not consistent so I didn't think much about it. Then about 6 months ago my driver side controls started only blowing max heat and passenger max cold. There was no way to change this as the controls don't work anymore. Now to make matters worse, when I turn off the vehicle the system continues to blow at full strength. The only way to turn the system off is to manually disconnect the battery every time. I've given up and am driving my other car for the time being because this is far too frustrating. Does anyone have any idea as to what could be causing this? Also, is there any way that I would be able to fix it without taking it to a shop? On a side note, around the same time my ac started acting up, my driver gauges (speedo and oil pressure) started spazzing out. Speedo thinks that 0mph is 100mph and takes it from there, oil gauge is pointing straight down. Don't think they are related problems, but wanted to include that just incase it is. Other than that, the car runs perfectly Thank you!