William wall heater parts can be purchased through SearsPartsDirect.com. The website carries parts for 61 different models of William wall heaters including models 455FX-RNAT, 550DVX-RLPG and 400DVILPG, that can be organized by manufacturer's release date.
Customers choose the desired Williams wall heater model and are then redirected to a page containing diagrams of the different sections of the appliance. Customers then choose the appliance section diagram that contains the desired part and are redirected to a parts list and a detailed parts diagram.
Most of the Williams wall heater parts sold via SearsPartsDirect.com can be returned within 365 days of the date of purchase. However, customers who wish to return items need to contact a customer service representative to obtain the return authorization number that needs to be returned along with the part.