Response to Hi, Stan. Based on the error code, the High Limit Sensor is bad and will need to be replaced. You can also check the wires or the PCB. 

An image is worth 1,000 words! Add an image or two to your comment to help ensure it is understood accurately.

Yes, please email me exclusive discounts, swimming pool tips and helpful how to guides. This comment may be posted on a public site. Do not include: HTML, references to other retailers, pricing, personal information, or any profane, inflammatory language.