c_shah wrote:
I have a Carrier home heating furnace 1989

So far working fine but thinking of replacing it with new furnace

Any recommendation what to look for? Any make or model recommendation?

What questions should I ask to HVAC contractor?

I have one small point you might want to look into. I
got a new furnace 2 years ago and the only problem I
have with it is that the blower is loud. You might want
to check on that before you buy a new furnace.

Bill Gill