Yesterday got this code from our pool heater. Fuse Link Fault/Field. It's a Jandy Legacy LRZ 399,000 BTU,. Did some googling and didn't find much. I found this in the troubleshooting guide FAULTFUSELINK/FIELD 1. Fusible link fault. 1. Identify and correct loose connections or replace Fusible Link... I believe the attached image points to the part needing replacement. Is there some diagnostic I can do before hand with a multimeter ? Is it just a fuse ? Any advice would be greatly appreciated !!!