Hello again. I posted back in August for advice on a new system. Thanks to a suggestion that I get a pressure test on my old Lennox Pulse, I got a credit towards a new Lennox. After reading about the comfort of a 2 stage model, I decided to get the Lennox G61 MPV, with a XC15 condenser, and a Honeywell Focus Pro TH6220. There have been a few glitches along the way. A couple of nights after the install, I got up in the middle of the night and when I stepped out into the hallway, I got the sensation that I was being beamed up by the mothership. That hum turned out to be a bad transformer. Then a few weeks later it got cold enough for the furnace to come on. After about a week, the furnace would start up and then shut down. That turned out to be a partially blocked condensate line. My HVAC company took care of both problems quickly. They have very good customer service.
The latest glitch hasn’t been as easy to solve. The weather here in Sacramento, CA has been pretty mild this Fall, so the furnace isn’t exacting getting put through its paces. But after a while I could swear that it was only running in one stage and it seemed to be second stage since it wasn’t particularly quiet. While I was playing phone tag with the installers, I ran across another post here about someone with the same setup as mine who was asking about the t-stat setup. His “system type” was set to O for 1/heat, 1/cool and he wanted to know if it should be set to 7 for 2/heat, 1/ cool. My little Honeywell operators’ manual didn’t mention a thing about a setup function, but I found the Focus Pro installation manual online and was able to check the setup. It had been left at factory default (1/heat, 1/cool). I set it up correctly and was so proud of myself, except it turned out that it didn’t make a difference. So I got the tech out, who seemed a little dubious, but finally had to admit that yes it was only running on one stage. I asked him take the t-stat off the wall to check if there was a fifth wire (I've been reading way too much HVAC-talk). I was betting there wasn’t, but I was wrong. He couldn’t get the dip switches set correctly, so he called Lennox support. They were all at a meeting. He came back Monday after talking to Lennox, set the dip switches and replaced the t-stat (same model).
I don’t want to call him back again without a little more backup knowledge, but I’m still not happy. Maybe Lennox just hyped the G61 so much in their literature that I am expecting too much. What is now stage 1 seems like it would be a nice blower speed for stage 2. It is nowhere near silent, but is a little quieter than my old furnace. It isn’t cold enough here yet for stage 2, so I ran the t-stat system test. I can barely tell the difference between stage 1 and 2. If this is the way it is supposed to be, the G61 isn’t worth the extra money. I do like the fan only setting. Now that is practically silent. Why can’t stage one be more like that? So my questions after all this rambling are: Is there some way to slow stage 1 down so there is more of a difference between 1 and 2? And would a different t-stat give me more control over the stages?
Thanks for your help and insights,