serial number of amana ptac
the date is on the data plate just about the service valves on the outside condenser. the serial number is how you can read the manufacture date. for example, serial number 9805100565, is read as manufactured in may 1998. this is the for all goodman and amana air conditioning units.
Read it from left to right.
From left to right
Jy44kba08va064793
4XABR25CBYA388509
follow and read on
You just read it.
If you mean a serial number on some product, it depends on what the product is. Each company can makes serial numbers mean anything they want it too.
it is on the warranty card if you can read it...
It's on the frame.
e Left to right
001g06s