it's very likely you need the blower, resistor and the pushbuttons. very common. did 3 last summer. go to the faqs and see how to pull the codes. if you have more than 1 or 2 and they refer to the blower, etc., that may be all you need, and then check that part out. do not throw parts at it. but, if you pull 5 or 10 codes and they refer to weird stuff like cabin sensors or other things that make no sense, then the pushbuttons are toast. there are 40 some codes available, my record for pulling is 31.

what happens is the blower gets old and draws more amps. that weakens the resistor, which again, draws more amps-from the controller. when i've encountered many nonsense codes and blower inop, i'd pull the controller and smell it. always has been burnt. good luck, chuck.