Why is my spa not heating and changing temperature? May 16, 2018 03:35 Updated Follow This could mean a glitch in your spa controller. We recommend resetting your controller, please refer to the instructions below. NOTE: The reset option only applies to Spanet controllers. Related articles Why does only one suction jet in the spa foot-well work? Who puts the latches on my new spa cabinet after delivery? Why is my power bill so high when I have a heat pump to heat my spa? Why is there yellow liquid coming out of the Ozonator? Can I remove and clean my vortex spa air jets? Comments 0 comments Article is closed for comments.