TM 9-2320-209-10-1 FRAME 4 1. To stop the engine heater, set the HI-LO switch (1) to LO position. 2. Set START -OFF -RUN switch (2) to OFF position, burner will stop within a few seconds. 3. Indicator light (3) will remain on, blower will keep running until burner cools and unburned gases are out. NOTE Always wait until indicator light (3) goes out before trying to restart engine heater. 4. If heater fails to start after three tries or stops after a short run, tell direct support maintenance. 4-394