As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER ENG START AND DURING TAXI OUT F/O PITOT HEAT LIGHT ILLUMINATED. GROUNDED - YES. FO'S PITOT HEAT C/B (P18-3 D 5) WAS TRIPPED. RESET C/B REF B737-800 AMM 20-60-01. PERFORMED PITOT HEAT OPS CK REF B737-800 AMM 34-11-01-860-174. OPS CK GOOD.