When I turn the econ setting on my car at anything above 65 to get some aair, the fan doesn't go on. I could get it on at 60 and to get heat, I disconnect the fresh air door cable and move it manually. The problem is intermittent. When it does work (it goes on a while after I turn it on) and D I turn it off, it won't turn on again. Blower is good. Steve '84 5ksT 1.8 bar