As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SEA - FLIGHT NR 2046, NR 2 FUEL TEMP AT 57 DEGREES ON CLIMB AND CRUISE, RAN CHECKLIST, TEMP REMAINED HIGH. ABOUT 25 DEGREES WARMER THAN NR 1. MAINTENANCE REPLACED FUEL TEMP BULB, NR 2 FUEL HEATER THERMAL ELEMENT IAW MTC 9730002. FUEL TEMP INDICATION CHECK OK. AIRCRAFT RETURNED TO SERVICE.