Heater Thermostatic Switch.

TM 5-4120-356-14

WARNING

Disconnect the air conditioner from the

e l e c t r i c a l power source before attempt-

ing to replace the heater elements or

electrical wiring.

(a) Replace electrical wiring or any heater element which shows

e v i d e n c e of damage which would impair serviceability or which fails during testing.

(b) If any heater element fails to function properly during test,

a n d wiring continuity checks OK, refer to step (3) and replace defective heater ele-

m e n t or elements.

(3) Remove and Install.

( a ) Turn selector switch to the "OFF" position and disconnect t h e

air conditioner from the electrical power source.

( b ) I f heater element or elements a r e t o b e r e p l a c e d , r e f e r t o f i g -

ure 3-27 for removal and installation.

(c)

R e i n s t a l l t o p p a n e l a s s e m b l y a n d fabric cover in accordance

H e a t e r Thermostatic Switch.

WARNING

Disconnect the air conditioner from the

e l e c t r i c a l power source before attempt-

i n g to test or replace the heater ther-

mostatic switch.

(1)

Test.

( a ) T u r n s e l e c t o r s w i t c h to the "OFF" position and disconnect the

a i r c o n d i t i o n e r f r o m t h e e l e c t r i c a l p o w e r source.

( b ) R e m o v e f a b r i c c o v e r and top panel to gain access to the thermo-

s t a t i c switch in accordance with paragraph 3-9.

(d) Refer to figure 3-29 and test the thermostatic switch.

( 2 ) R e p l a c e . R e p l a c e the thermostatic switch if any failure occurs

during testing in accordance with the procedures shown if figure 3-27.

( 3 ) I n s t a l l a t i o n . I n s t a l l the thermostatic switch in accordance with

t h e procedures shown in figure 3-27. R e i n s t a l l t o p p a n e l a n d f a b r i c c o v e r .