TM 9-2320-209-34-2-3 (b) Starting and stopping heater. FRAME 1 1. Turn heater HI-LO switch (1) to HI position. 2. Turn heater switch (2) to START position. Blower should start at once and heater should ignite within 1 minute, with warm air in 2 to 3 minutes. 3. Turn HI-LO switch (1) to LO position. Burning should decrease and heat should be less than at HI position. If heater does not work properly, refer to para 21-13 for repair. GO TO FRAME 2 21-113