I had a G71MPP installed a few months ago, and while the install seemed great, I grabbed the manual tonight because it seemed to me like the unit was kicking on and off in a very much 2-stage way, and not variable. Sure enough, the dip switch to enable variable wasn't flipped (#2), despite the fact the installer told me it was when they installed it.
Anyway, I flipped it on my own tonight, but now it only runs at 40%. (The diagnostic code that flashes is h40c563.) Is there something else I need to do to get this to truly be "variable"? It is running on the 2-stage Lennox digital (touchscreen) t-stat, so my understanding is this should all be supported "out of the box".
Right now, for instance, the t-stat is set at 68, and the inside temperature is 62. Yet, it continues to run at 40%. I set the t-stat down to 60 to shut off the furnace, and then put it back to 68. When it fired back up, it flashed h70 a few times on the furnace diagnostic, but then settled on h40 again. Thoughts??
If not, no worries -- I can get the original installer out here, but if it is just flipping another switch somewhere, just easier to do it myself. Many thanks.