As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LOW TEMPERATURE SWITCH (PN M1060045144) WAS INSTALLED IN PLACE OF CORRECT HI TEMPERATURE SWITCH(PN M1165155144) AT THE TIME OF MANUFACTURE, CAUSING HEAT SYSTEM TO NOT FUNCTION AT ALL. HIGH AND LOW TEMPERATURE SWITCHES ARE IDENTICAL IN APPEARANCE. MFG SHOULD COLOR CODE THEM TO PREVENT INSTALLING THEM IN THE WRONG LOCATION.