TM 9-2350-277-20-2PREVENTIVE MAINTENANCE CHECKS AND SERVICES (PMCS), INCLUDINGLUBRICATION INSTRUCTIONS — Continued0155 00ITEMNO.INTERVALMAN-HOURITEM TO BECHECKED ORSERVICEDCREWMEMBERPROCEDUREEQUIPMENTNOT READY/AVAILABLEIF:g. Check heater control box, switches, and lightbulb. Tighten or replace bad switches and bulbs(WP 0702 00).h. Start, run, and stop heater (see your -10).During start cycle, check that switches and lightwork properly. Check for increase in blowerspeed after ignition.i. During operation, check for unusual noises.Check for differences between high and lowheat levels.j. When stopping heater, check for correct purgecycle. Verify that indicator light operatesproperly. If heater does not operate as specifiedabove, perform troubleshooting (WP 0086 00).HEATERCONTROL BOXLIGHT BULBSWITCHES015500-167
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