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TM 9-4120-389-14
4-56. HEATING ELEMENTS (HR1 THROUGH HR6)
Preliminary procedures:
1. Remove top cover (See para. 4-14).
2. Remove junction box (See para. 4-46).
WARNING
Voltages used can kill. Always disconnect power cord to air conditioner before performing any internal
maintenance. Shutting unit off at its control module does not disconnect unit power.
a. Inspection
(1) Check heating elements for deformation, damaged terminals, loose or missing nuts and cracked
or broken outside covering.
(2) Check wires and terminals for frayed or broken wires and damaged terminals.
(3) Replace and repair as needed.
4-166
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