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Figure 3–15. Electric heaters.
rings and casing. Four bushing sizes are availa-
ble as follows:
(1) 13215E9824-1, 0.094 in.
(2) 13215E9824-2, 0.125 in.
(3) 13215E9824-3, 0.156 in.
(4) 13215E9824-4, 0.188 in.
b. Removal. The mount bushing is removed by
removing the fan motor (para 3-36).
c. Inspection. Inspect the mount bushing for
deformation, deterioration, and damage.
d. Installation. Installation is the reverse of re-
moval.
3-38. Electric Heaters
a. General Six electrical resistance heaters are
mounted directly behind the evaporator coil. The
heaters provide the heat called for by the ther-
mostat and rotary selector switch settings to
maintain the required temperature of the condi-
tioned air. Positioning the rotary selector switch
I-
in the H HEAT position places all six heater
elements in operation. Moving the selector switch
to the LO-HEAT position reduces the heating ca-
pacity by suppplying power to only three heater
elements.
b. Testing.
(1) Refer to figure 3-4 and remove the top
access cover.
(2) Tag and disconnect wires from heater
(fig. 3-15).
(3) Check for continuity between terminals
A and B of heater (fig. 3-15). There should be
continuity.
(4) Check for continuity between heater
terminals and heater element exterior insulating
sleeve. There should be no continuity.
(5) Check heater resistance is no less than
the following values:
(a) Cold resistance (70° to 75° F) —1.43
megohms.
(b) Hot resistance (operating tempera-
ture)—1.06 megohms.
3-39. Condenser Fan Baffle
a. General. The condenser fan baffle is located
directly behind the condenser fan. The baffle
helps to reduce condenser fan noise. The con-
denser fan must be removed to gain access to the
baffle.
b. Removal.
(1) Refer to paragraph 3-24 and remove the
condenser fan.
(2) Refer to figure 3-16 and remove the baf-
fle.
c. Installation. Installation is the reverse of re-
moval.
3-40. Refrigerant Compressor Mounts
a. Inspection.
(1) Refer to paragraph 3–30 and remove the
junction box.
(2) Refer to figure 3-17 and inspect the
compressor mounts for damage, deformation, and
deterioration.
b. Removal Report a defective condition to di-
rect support maintenance.
3-23
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