Original source https://infraredsaunaparts.com/golden-design-sauna-repair.html
Control Panel Malfunctioning
Solution: The control panel will turn on, but not off and the displayed numbers flash. The issue may be a connection problem. Go up to the roof and locate the “CTRL” wire harness you connected when the roof was installed onto the sauna room. Disconnect the “CTRL” wire harness, check the pins to make sure they are straight and not bent, and firmly reconnect the “CTRL” wire harness. Attempt to turn the sauna on at the control panel and check to see if the buttons are now responding. Contact the manufacturer for any additional troubleshooting.
