Does Carrier change their part numbers frequently? I'm currently having a "new" system installed and when I do a search on Carries website, the part numbers do not come up. I did a Google search on the evaporator coil and got one hit, a website for Bargain, Surplus, and Obsolete parts.

Heater 58CTX090---13116

A/C Condenser 24APA748

Evaporator Coil CNPVT4821ACAABAA

Any idea what that is?

Is this a typical installation (taped heater to evaporator coil)? I would assume that there would be a gasket to seal the two assemblies together rather then tape.