Equipment guides
Start with the question you need to answer. These guides explain how to find the right identifiers, check official documents and understand the limits of a lookup.
8 guides · Manufacturer and government references · Review dates shown
Reading your equipment
Reading your equipment
Model number vs serial number: what is the difference?
Know which number to copy for manuals, manufacture dates and manufacturer support.
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Read guideReading your equipment
How to find your water heater model and serial number
Locate the product label safely and copy the information needed for a useful lookup.
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Read guideReading your equipment
How to find your furnace model and serial number safely
Use records and manufacturer guidance without opening equipment to satisfy a lookup form.
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Read guideDates and decoding
Dates and decoding
Manufacturing date vs installation date
Understand which date a serial code can establish and which records you need for installation or warranty questions.
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Read guideDates and decoding
Why some serial numbers cannot be reliably decoded
Learn why formats, repeating year codes and incomplete evidence can prevent a reliable manufacture date.
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Read guideDates and decoding
What an equipment serial number can and cannot tell you
Separate a documented production-date interpretation from model verification, condition and recall status.
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Read guideRecalls and documents
Recalls and documents
How to check whether home equipment has been recalled
Find official U.S. notices, compare the identifiers, and understand why an empty search is not a safety clearance.
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Read guideRecalls and documents
How to find the correct official equipment manual
Find manufacturer literature and check its model coverage before relying on it.
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Read guideNeed help with your equipment?
Use the lookup for supported serial formats, or suggest a topic for the guide library.