As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) DURING DEPARTURE THE AIRCRAFT`S HEATER FAILED AND THE CREW WAS UNABLE TO RESTART THE HEATER. THE AIRCRAFT RETURNED TO POINT OF DEPARTURE AND LANDED WITHOUT FURTHER PROBLEM. MAINTENANCE REPLACED THE HEATER PRESSURE SWITCH AND THE AIRCRAFT RETURNED TO SERVICE AFTER SATIFACTORY GROUND CHECK. (TC NR 20070319001)