As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT 742 DIVERTED TO DAB DUE SMOKE AND FUMES IN THE CABIN. SMOKE AND FUMES DISSIPATED IMMEDIATELY FOLLOWING QRH PROCEDURES. C/W ODI CHECK LIST. FOUND FWD DOOR AREA HEATER INOPERATIVE. FORWARD TO MEL. REPLACED RECIRCULATION FILTERS. FORWARD DOOR HEATER REPLACED ON LOG PAGE 6985519 MCO/PLAC REMOVED. SYSTEM OPERATION IS NORMAL.