Verify 120V power at the connection to the panel at the junction box at the rear of the panel. Verify the panel power switch is in the "ON" position (if equipped). LAVA internal temperature limiters may have actuated. Turn off the unit using the "Power" switch on the panel and wait 30-60 minutes for the unit to reset. Turn the unit back on and operate normally.
If you experience additional issues, please give us a call at 1-800-875-5285.