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HVAC serial number lookup

Enter a serial number to check supported date formats and estimate equipment age. Ambiguous matches need a manufacturer check.

Serial number

Enter the serial exactly as shown on the label.
Example: 4006A17330

Where to find the serial number on your equipment

Where to find it

The serial number is typically on a label on your outdoor unit, furnace, or air handler.

Location and label format can vary by manufacturer and model. Check your outdoor unit, furnace, or air handler.

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HVAC Judge provides general information and planning estimates, not a diagnosis, installation design, warranty decision, or contractor quote. Check equipment details with the manufacturer and use a qualified HVAC professional before repair, replacement, or installation.