Q for Lennox iComfort users or Lennox Pros
I have the SLP98/XP21/iComfort combo and seem to be having issues with the iComfort. I was wondering if anyone may be seeing the same or can share some of your settings or experience with your system.
I have propane so my goal is to run as much on HP as possible. Issue I have with the iComfort is that it seems to "freeze" when outdoor temp gets closer to the Low balance point setting.
My current settings are :
Setpoint - 67 constant no setback
High Bal Point - 25
Low Bal Point - 20
Stage timers - 20 mins
Temp staging - 1,1,0.5,0.5,0.5,0.5
all others at default
What I'm noticing is -
1. The stage timers are somehow tied to the High bal point. It wont go to the next stage even after 20 mins if outdoor temp is below the high bal point, so I set mine fairly low at 25 so the stage timers will work. According to the manual, the stage timers are not even supposed to work as the furnace controls it?? Not sure how this can be the case for the HP part. It seems to work for me under the right conditions! Not sure if this is a feature or a bug. Does your stage timer work for the HP?
2. As outdoor temp gets closer to the low bal point, the HP will continue to run on low and not go to high stage even after 20 mins. Seems to tie in with my point above. Or sometimes it will go high and then fall back to low and continue at this stage even when it cannot meet demand and the indoor temp drops below the setpoint. This is when the iComfort seem to "freeze" and wont even turn on the furnace even when outdoor temp drops below the low balance point. If I manually drop the setpoint so the unit will stop and then set it back to the original setpoint, then everything starts to work again as set and the furnace will come on.
My installer warned me against using the iComfort as they find it has a lot of bugs and I somehow gave Lennox the benefit that such a company will not release a buggy thermostat. Guess I may be wrong. Unfortunately I'm their only customer using the iComfort so they're not able to provide much help. I'm pushing for them to get me in touch with a lennox engineer. Hoping someone here can help in the meantime.