Mine just stop working today. Only blows cold air, when I move the temp selector to hot I hear clicking behind the dash for about 10 or 15 seconds and then it stops. I looked it up in my manual and the odd thing is the manual how two temperature blend door actuators a LH and RH side. I don't know why there would be 2. I guess I need to replace both if there are 2. One is on the drivers side kind of under the steering wheel. The other is located behind the glove box. Seems like a simple fix and parts are cheap.