I have a comfort Maker heat pump unit.
Mod# CHP024 AKCI
Part # 1088454-0179
Serial# E033733997
Manufacture# CHP024AKCI

Can you tell me how old this unit is?

To tell you the truth delfamin, without a crystal ball, no can't tell you the age of your unit. But a quick call to the manufacturer may divulge that information.

Here is their website:Comfortmaker® Air Conditioning & Heating (http://www.comfortmaker.com)