Recalls on units

Hey all
When you guys check out a furnace and Central A/c, do you always do a seach for recalls? How do you do this? Do you just search on google or do you go to manufactures website?
Intertherm with serial # MGH8902-03577
Miller/Nordyne Serial number MK0788-01-001
I am guessing the Intertherm is a 1989 and the miller/nordyne is a 1988?
Thanks for any help!

I don’t always do a recall search but I have this site available to the client:

I do recall research on everything in the house.

I have stored this at About Homes for NACHI members; it is from my Interactive Report System Version 2:

CPSC Recall Research