OEM Warranty Authorization Request This service is provided by Evans Tempcon, Inc. to Authorized OEM Dealers and Service Centers only. Please provide your passcode below to login and complete the Warranty Authorization Form.   Once completed, your information will be forwarded to representatives at Evans Tempcon for review, and you will be contacted if further information is required. If at any time you have a question or would like more information, please call us at 800-878-7147 or send an e-mail to warranty@evanstempcon.com.    Authorization Passcode: