My jandy pool lights wont cycle thru the colors. it stays on white light

SOURCE: jandy aqua link main control box

Do you have a 4 button switch in the spa and is the light on the button that is slightly under water? If so , the button is bad as the water is completing the circuit and turning the light on and off.

Repalce the button or disconnect it at the outdoor panel.

SOURCE: Jandy, Lite 2 Pool heater wont kick in

3/4 pipe line will work and will keep heater from sooting up.

SOURCE: Jandy Aqualink RS4 controller won't turn lights on/off

AquaLink Trouble shooting guide

SOURCE: Pool heater will light then turns off

check gas pressure you should be getting about 10" water coloum

SOURCE: Jandy aqualink rs8.Pool and spa lights wont come

If it's both lights and they are on seperate switches I would start by checking the GFCI and be sure it is not tripped and if it is you would need to find out why. Then check power in and out of the light module in your power center. If you can set the power center to service and turn the lights on manuley from there then it is programming but most of the time it will be something in the lights or their circut.