About HVACchecker.com
A free tool built by a plumbing and HVAC pro to help homeowners and technicians figure out the manufacturing date and age of any HVAC system from just the serial number.
Austin Barnes
Founder, HVACchecker.com
I started HVACchecker.com after one too many service calls where the homeowner had no idea how old their system was. Half the contractors I worked with had their own little trick for reading serial numbers, and most of those tricks were wrong more often than they were right.
So I built the site I wished existed. Type in a brand and a serial number, get the manufacturing date back in a couple of seconds. No account, no email signup, no upsell. Just the answer you were looking for.
If you also need to look up a water heater, I built a sister site for that too: WaterHeaterChecker.com. Same idea, same approach, just for water heaters.
How the data works
Serial number decoders
Each of the 37 HVAC brands we support has its own serial number format. Our decoders are built from official manufacturer documentation, technician training manuals, and verified field data. No crowd-sourced guesses.
Recalls database
HVAC recall data is synced from the U.S. Consumer Product Safety Commission (CPSC) so you can quickly check whether your unit is affected and get the free remedy.
Model number lookups
When a serial number doesn't match a known pattern, we use the model number as a fallback to identify the brand and narrow down the likely production date.
Reliability scoring
Community feedback from homeowners and plumbers powers our model reliability scores. Reviews from licensed pros are weighted higher, and scores use Bayesian averaging to stay honest when a model only has a handful of reviews.
Kept current
Decoders get reviewed when new model years roll out. Recall data syncs automatically from CPSC. Our guides are refreshed at least once a year.
Free and private
No account required. We don't tie serial numbers to your identity, and we never sell personal data.
How we keep the lights on
HVACchecker.com is free for everyone. We pay the bills two ways:
- Affiliate links when we recommend a contractor network like Angi. We may earn a commission if you become a paying customer, at no extra cost to you.
- Partner referrals to local HVAC contractors when a homeowner's system clearly needs replacing. Contractors can apply on our partners page.
We don't get paid by manufacturers, and brand recommendations are never influenced by who pays us.
Got a serial number we can't decode?
Send it over. We add new brands and formats based on real requests from homeowners and techs.