Where can I find the serial number on my HVAC unit?

Where to Find My Serial NumberWhen registering your heating and cooling system or reviewing your HVAC warranty online, you’ll need to find the serial number on your unit. Firstly, if your original sales invoice is handy, it should contain the information you need. Otherwise, check the equipment itself.


Here’s how to locate the model and/or serial number on an HVAC unit.

To start, use the reference images below to determine whether you have a split system or a package system. Then follow the diagrams to locate the model and serial number tags.

An important note about registering Split Systems.

Because there are two different units in a Split System, you’ll need to register two different model and serial numbers. On outdoor units, the model and serial number tag is located on the top corner of the unit. For the indoor units, the tag is located at the top of the inside front cover.