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Page Title: TABLE 4-2. TROUBLESHOOTING (Cont.)
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TM5-4120-387-14 TABLE  4-2.  TROUBLESHOOTING  (Cont.) MALFUNCTION TEST OR INSPECTION CORRECTIVE  ACTION Step 6. Check  air  flow  out  of  conditioned  air  (evaporator)  discharge grille.  If air flow volume is low: a. Adjust  conditioned  air  (evaporator)  intake  grille  louvers. b. Clean and service or replace conditioned air filter element. (See para 4-25. ) c. Clean and service or replace mist eliminator. (See para 4-26.) d. Clean  evaporator  coil  and  entire  evaporator  section. (See para  4-61.) Step 7. Check for loose or damaged wires and terminals. Voltages used can kill. Always  disconnect  power  cord  to air  conditioner  before  performing  any  internal maintenance. Shutting unit off at its control panel does not disconnect unit power. Tighten loose or damaged terminals. Repair or replace damaged wires. (See para 4-27.) Step 8. Check operation of heater thermostat (S3). Test thermostat. (See para 4-56.) Replace  thermostat  if defective. Step 9. Check individual heaters (HR1 thru HR6). Test heaters. (See para 4-57.) Replace defective heaters. Step 10. Check operation of fan toggle switch (S7). Switch from LO to HI SPEED. If no change results, test switch. (See para 4-48.) Replace bad switch. 7. NO HEAT IN EITHER HI HEAT OR LOW HEAT MODE. Step 1. Check  for  loose  or  damaged  electrical  connectors,  or  damaged  wires in wiring harnesses. Voltages used can kill. Always  disconnect  power  cord  to air  conditioner  before  performing  any  internal maintenance. Shutting unit off at its control panel does not disconnect unit power. Tighten  or  replace  loose  or  damaged  connectors  or  repair  damaged wires. 4-47

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