HEATER ELEMENTS.

TM5-4120-384-14

4-33.

HEATER

THERMOSTAT.-Continued

(3) (Models F18H-3S and F18H-1S only) Attach

thermostat

and

bracket to top center cover with two screws.

(4) Install top front cover on F18H-3S and F18H-1S or top

cover on F18H-3SA and F18H-3SB (para 4-11).

(5)

Connect

power

source.

4-34.

HEATER ELEMENTS.

The heater elements are located in the upper front

compartment

behind the evaporator coil.

(See fig. 4-30.)

Disconnect input power from the air conditioner

before performing maintenance on any part of the

electrical system.

The voltages used can be lethal.

Allow heaters to cool before touching.

Severe

burns

can result from touching hot heaters.

Inspect/Test.

(1)

Disconnect

power

source.

(2) (Models F18H-3S and F18H-1S) Remove three top covers

(para 4-11).

(Models F18H-3SA and F18H-3SB) Remove top cover

(para 4-11).

(3) To gain access to terminal board TB2 where heater element

leads are connected the junction box and control module must also

be removed.

(See para 4-21 and 4-26.)

(4) Visually inspect each heater for obvious damage,

deformation, cracked or broken sheath, burnt out spots, and

loose,

broken, or otherwise damaged leads.

(5)

Use a multimeter to check continuity

each

heating

Continuity should be indicated.

element.

Removal.

(1)

Tag

and

disconnect

leads

from

terminal

board

TB2.

4-98

Change 2