American Standard equipment comes with a factory Base Limited Warranty.

To receive a longer Registered Limited Warranty the equipment must be Registered within 60 days of installation or home purchase.*

• Record the model(s) and serial(s) on the installers's invoice.
  

To register equipment: Within 60 of installation go to www.AmericanStandardAir.com and click on Resources then Warranty & Registration.

The homeowner or installing dealer can Register the equipment.

*The above is a summary only of the official document, which can be found here.

The dealer or homeowner can go to www.AmericanStandardAir.com and click on the Menu / Support / Warranty & Registration.
Click on the Look up existing warranty

If the results come back with no matching serial number then only the Base Limited Warranty is in effect.

OR

The dealer can log into www.ASDealerNet.com and perform a Serial Number Lookup.
There it will display if the equipment only has a Base Warranty or if the equipment has been Registered with the effective dates.

Warranty and Registration help page

First time Register help:

Call the American Standard HVAC Warranty Registration Center at 1-833-986-3310

Transfer a warranty help:

Call 1-833-986-3310

Or email product.registration@concentrix.com