As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PHX - AIR TURNBACK - ON CLIMB, NR 1 ENG. BLEED FAULT OCCURED; A RESET WAS PERFORMED PER MAINTENANCE CONTROL AND BLEED WORKED, RETURNED TO NORMAL; A/C RETURNED TO PHX DUE TO POSSIBLE REPEAT AND WEATHER CONDITIONS IN DCA. MAINTENANCE TROUBLESHOT AND REPLACED THE LT TEMPERATURE CONTROL THERMOSTAT; FUNCTIONAL AND BITE CHECKS WERE GOOD.