Weller provides repair service (warranty and non-warranty) for their products. I use this service for Calibration of Weller WCM1 as well as Weller repairs, when parts are unavailable (and Weller repair service is cheaper than eBay parts).
Here are the latest contacts (Phone / Web Mail) that have, as of March 28, 2022
Weller: Product Specialist/CSR – Toll Free: 866-498-0484
Weller Web Mail: firstname.lastname@example.org
NEW: Weller Website: http://www.weller-toolsus.com
Weller Professional Tools Division ; Repair Department ; P.O. Box 728
1000 Lufkin Road
Apex, NC 27539