I have disconnected the remote control for the StaRite pool heater and now use the manual buttons on the top of the heater. They require multiple pushes to enable the pool heater, the spa heater, and the off button. Sometimes I push for more than a minute and it still doesn't activate. What is the fix?

Pool & Spa - Sta Rite - STA-RITE CONTROL BOARD KIT - 42001-0096S