As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT 198 LAS-JFK, ELECTRICAL FUMES SMELLED BRIEFLY WHEN HOT WATER SELECTED IN FWD LAV HOT WATER HEATER TURNED OFF SMOKE AND FUME ALARM WENT OFF FOR 2 SEC AT LEVEL OFF. REMOVED AND REPLACED FWD LAV HEATER AS PER AMM 38-12-16. OPS CHECK GOOD.