Aqualink not turning on heater

Sorry misread it AS not turning on in service mode, most likely settings issue. Desired temp isn’t above current temp or the heat source isn’t binded to heater also could be inadequate flow. Going off limited info.
 
Sorry misread it AS not turning on in service mode, most likely settings issue. Desired temp isn’t above current temp or the heat source isn’t binded to heater also could be inadequate flow. Going off limited info.
It works in service mode. I think it’s a setting issue. In settings do we set the heater to automatically trigger in spa mode and optional in auto mode? Auto locks the heat button out
 

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