A hot tub control panel acts as a timer, keeps the temperature constant, turns off. If only part of the control panel is not working, check for any blinking lights or. The Spa Topside control panel is used on hot tubs, portable spas, jetted tubs – just about every spouses a display panel to allow the user to easily control them. Hot tub troubleshooting on your own can save you big bucks on the simple hot tub. Your hot tub control panel can display several other codes. It’s one of the most common problems with a hot tub. 3 reasons why you. Step one is to check for any error messages on your control panel. Learn about most common spa control problems and how to fix issues with the spa. The hot tub control panel is like a timer that keeps the spas. You likely look forward to a hot tub soak every day. So, when you see an error code on your spa’s control panel, you might worry that you’ve lost. If the problem is not obvious, look on the topside control panel for diagnostic messages. If no messages are seen, run through all spa functions and note any. I changed the water in my Emerald 599E yesterday, turned the power on and found the control panel unresponsive. the lights come when the. I have a 2002 Optima spa. Several months ago the button on the top-side control panel for the 2-speed pump (#1) stopped working.