What was found
INSTALLED A NEW C&D AIRCRAFT HEATER AS A REPLACEMENT TO THE OLD HEATER UNIT. THE NEW HEATER WOULD RUN APPROX 5 MINUTES AND THEN PRODUCE NO HEAT. TROUBLESHOOTING SHOWED THAT FUEL WAS REACHING TO THE NOZZLE SOLENOID VALVE, BUT NOT PAST. VOLTAGE WAS PRESENT, AS WELL AS A CLICK FROM THE SOLENOID. REPLACED THE SOLENOID VALVE WITH THE SAME PN, AND HAD THE SAME ISSUE. FURTHER TROUBLESHOOTING, USING SHOP AIR ON THE VALVE AND A BENCH POWER SUPPLY, SHOWED THAT AFTER VALVE WOULD HEAT UP FROM THE ELECTRICAL CURRENT RUNNING THRU IT (APPROX 5 MINUTES) THE UNIT WOULD NOT ALLOW AIR TO PASS. THE MFG WAS ADVISED OF THESE FINDINGS, AND TESTED A REPLACEMENT VALVE OF THE SAME PN, BUT OF A DIFFERENT BATCH NR AND FOUND IT TO