<html><head></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; ">HI, All,<div><span class="Apple-tab-span" style="white-space:pre"> </span>Well, It's beginning to get cold in Virginia, and I have 2 issues w/ the heating. Actually, 3. First: I don't really understand how it's set up. I have a TC w/ air, and heating and cooling are separate - easy to understand. But I don't get what activates the heating in the 3500. When I turn the heating control knob about 1/2-way around, I hear the familiar "flump" of what I guess is a flap inside the box. Unfortunately, I don't always hear the "flump" these days. and I also don't get any heat on those occasions. (Devilishly, the heat control seems <i>always</i> to work when it's temperate outside.) </div><div><span class="Apple-tab-span" style="white-space:pre"> </span>Finally - separate issue - at any season of the year I always have warm air gently blowing on my feet - driver's side, not passenger's side - which is <i>not</i> what I want when it's 95% outside.</div><div><span class="Apple-tab-span" style="white-space:pre"> </span>So whatever light anyone can shed on this situation, I'd be really thankful. </div><div><br></div><div><span class="Apple-tab-span" style="white-space:pre"> </span>Jim Pile</div></body></html>