TM 10-4520-263-12&P   0009 00 0009 00-2 THIS WORK PACKAGE COVERS: TROUBLESHOOTING PROCEDURES Maintenance Level Materials/Parts Operator Rags, Wiping (WP 0049 00, Item 1) Table 1. Operator Troubleshooting Procedures MALFUNCTION TEST OR INSPECTION CORRECTIVE ACTION 1. Heater does not start 1.     Check to see if fuel tank is empty. Check fuel supply and replenish if necessary. 2.     Check to see if fuel shut off valve is set to ON. Set fuel shut off valve to the ON position. 3.     Not enough or no primer fuel in bottom of burner. Ensure that enough priming fuel is used prior to lighting the heater. 4.     Lighted tissue paper not placed in bottom of burner. Use priming rod to push lighted tissue paper to the bottom of the burner. 5.     Air vent not open. Open air vent two to three turns. 6.     Air bubbles in fuel line. Shake the fuel lines to dislodge any air bubbles. 7.     Float stuck in an UP position. Tap and/or shake the float assembly to free up the float. 2. Heater does not operate properly. 1.     Check to see if fuel tank has been filled with authorized fuel and that the fuel is free of water, debris or contaminants. Fill fuel tank with a clean,         authorized fuel. 2.     Check the sections of the stack assembly for poor seals. Rotate the stack assembly sections to obtain tight seal. Replace a damaged stack assembly. 3.     Check rain cap and stack assembly for heavy accumulations of snow or ice blocking rain cap. Check the interior of the rain cap and stack assembly sections for accumulation of creosote on inside surface. WARNING Turn off heater and let cool. Clean  the interior of the rain cap and stack assembly.   Refer to WP 0013 00.