Mine doesn’t have ax but I have the same short cycling problem then my
furnace started making a repetitive almost low revving noise. It’s a new
furnace within the last 7 months and the nest was installed 5 days ago
I am having the same problem. I’ve changed the filter and after
restarting it worked great for an hour. But then seemed like the house
was too hot even though it wasn’t set higher. Now it’s back to the same
thing.