Part numbers can be confusing. Multiple numbers for the same part, superseded numbers, and aftermarket equivalents all add complexity. Here is how to make sense of it.
OEM Part Numbers
OEM (Original Equipment Manufacturer) numbers are assigned by the company that made the appliance or system. Example: GE part WB44T10010 is an OEM oven igniter.
Aftermarket Parts
Aftermarket parts are made by third-party manufacturers to fit the same application. They are usually 30-60% cheaper than OEM. Quality varies — stick with well-known aftermarket brands.
Cross-Reference Numbers
When a manufacturer updates or replaces a part, they assign a new number. The old number still works for searching. Example: A Carrier part might be listed under both the Carrier number and the original component manufacturer number.
Superseded Parts
"Superseded" means the part number was replaced by a newer version. The new part should be a direct replacement. Always use the latest superseded number when ordering.
Tips for Searching
- **Search the number on the old part first** — even if it is aftermarket
- **Try without dashes** — WB44T10010 and WB44-T10010 might give different results
- **Search the model number** if you cannot find the part number
- **Use PartHawk** to search all suppliers at once — cross-references show up automatically across different supplier databases