Leaving furnace until it dies Hi,
I have a 2014 90% bryant.
The furnace looks like it wasn't maintained well and has had issues. It runs fine with the door off but short cycles then shows code 33. It goes back to normal and runs showing no code then repeats until house reaches temp.

I could replace this for 4500 but I was thinking of just using it like this until it completely dies. Is there anything wrong with that?