So, here is an interesting observation, and hopefully my theory is right...
It's in the 90s here, we have 2 air conditioners going full throttle, one in my bedroom where I run the Cloud. I am right now heating the unit for 25 minutes and my light won't go green. This is at the noon position. If I dial down past the 8 oclock position, the light goes green. I just hit it and it's seems OK, maybe not as hot as it should be, but fine.
So, I know nothing about electricity, but could the use of the air conditioners be sapping the power? And if so, this is either causing:
The lights on the Cloud to malfunction but the heat to be OK.
The Cloud is just not getting up to the correct heat, therefore the light remains red.
I am hoping its the first, but I think it's the second. Making it harder to discern if the temp is still the same is the fact I just switched to 2 new medicine varieties. Anyway, I have no idea about this, but the light goes green in the morning, with no air running in the bedroom.