Lang will now require authorization numbers be issued before service agents respond to warranty service calls. Before you schedule service calls please call us at 1-800-264-7827 and press prompt 2 during normal business hours Monday to Friday 8:00am to 5:00pm CST. Service Dispatch will provide an authorization number for warranty repairs after obtaining the necessary information. 
 
After hours emergency authorizations will be provided by the “On-Call” service technician. The on-call technician can be reached after normal business hours at 800-264-7827, prompt #1.