Heat Pump age, Please

Amana Heat Pump

Model # VHA 36C2C
P1246408C

S/N 0412500498

Please explain how to decode as well.

Thanks

Mfg’d in 2004…34,000 BTU…10 SEER

Combination of Preston’s guide (it does help sometimes) and the serial number to verify Preston’s.

the first two numbers are '04.

GOODMAN AMANA – JANITROL – AMERICAN STANDARD: First two digits of the serial number are the year. Second two are the month.

Thanks