If you need to make any changes, please contact customer service at navien@shamrockcompanies.net
Customer Service may be reached. Our phone line is staffed from 8:00am - 5:00pm CST at (520) 687-0924.
TECHNICAL SUPPORT FOR NAVIEN WATER HEATERS: 800-519-8794, then select Option 2.
Or at: https://www.navieninc.com/support.