Like it states, I press ECON and no air whether on Low,High or Auto blower. Hit Normal A/c and the same. Hit Bi-level or Defrost and it works fine on any blower setting. I took the push button out and apart to clean the inside with tuner cleaner. Worked for a bit then back to the same. Intermittently, if I run on Bi-level for a while then switch to ECON, it works for a short time. I'm thinking bad push button assembly. Should I suspect the blower regulator as a possibility as well ?? TIA....