Chrysler 1956 Imperial Service Manual page 91

shaft for distorted or cracked shoulders, Re-
place connector as necessary.
I nspect rubber cou pling for vis ible damage or
deterioration. Replace if necessary.
Inspect heater burner blower to burner and
exchanger housing flexible hose, grommet and
clamp for deterioration or other visible damage.
Replace hose with grommet if necessary. Re-
place clamp if necessa ry.
NOTE: The ignition unit CL8sentbly
U
a sealed
unit and should not be disassembled. If inspec-
tion or tests indicate the unit to
be
faulty, re-
place the assembly.
Inspect heater case lower half for distortion,
broken ' .... elds or other visible damage. Repair as
necessary.
Inspect heat exchanger assembly for broken
seams, broken welds, distortion or other visible
damage. Repair or replace heat exchanger as
necessary.
Inspect louver plate and mixer assembly for
loose rivets broken grou nd electrode, distortion,
or loose bame plate. Repair or r eplace as nec-
essary.
Inspect burner and exchanger housing for
cracks, r estricted fuel inlet screen, broken or
distorted spark plug gasket seating surfaces,
loose or missing heater blower air metering
hole plug, or damaged hou sing threads.
If
in-
spection reveals housing is not fit for further
service, replace the assembly.
Check nozzle for restricted metering hole,
plugged screen or damaged threads. Blowout
metering hole with a limited amount of air pres-
sure. Blowout screen.
Ii
other visible damage
is evident, replace the nozzle.
Inspect the spark plug and gaskets. Inspect
spark plug for cracked porcelain, broken or ex-
cessively burnt electrode. Replace spark plug
and gaskets if necessa ry.
Inspect spark plug cap for cracks or distor-
tion. Replace cap if necessary.
Inspect fuel line inlet fitting for distortion or
damaged threads. Replace fitting if either of
these conditions exist.
Inspect fuel valve coil for loose, broken ter-
minals or other visible damage. Replace coil and
retainer gasket if any of these condit ons exist.
91
Inspect coil retainer cover for corrosion or
loose terminal rivets. Correct as necessary.
Inspect burner and exchanger assembly to
heat exchanger clamp assembly for broken
welds, cracks or other visible damage. Replace
clamp assembly if necesary.
Inspect burner and exchanger assembly to
heat exchanger gasket for deterioration or
other visible damage. Replace gasket as nec-
essary.
Inspect the overheat switch located in the
upper half of the heater case for broken porce-
lain, burned or broken wiring, loose or broken
contact points, or other visible damage.
If
the
wire connections are loose at the overheat
switch, correct by soldering.
If
any of the other
conditions exist, replace the overheat switch as-
sembly by first un soldering the one white wire
at the capacitor (condenser), disengage both
wi reo:. from under the cover clip, then remove
the two overheat switch attaching screws and
remove the overheat switch assembly with
wires.
If
the capacitor (condenser) is to be re-
placed, umolder the two wires at the terminal
block in the cover and remove the capacitor.
Replace the damaged parts with new ones and
install by reversing the above procedure.
I nspect the burner blower metering port plug
grommet for deterioration or other visible dam-
age. Replace grommet as necessary.
TESTING HEATER SYSTEM
AND COMPONENTS
Where the heating system is not functioning
properly (insufficient
01'
no hellt) the cause will
be found in either the electrical or fuel systems
or a combination of both systems. Simple pro-
cedures for isolating the causes of the trouble
and the methods of correcting t he same are as
follows:
ELECTRICAL SYSTEM
Turn the ignition, temperature control and the
blower switches to the "ON" position. Refer
to the wiring diagram, Figure 3; with the aid
of a 12-volt test lamp check the continuity of
the electrical circuit as follows: Connect one
lead of the test lamp to a good ground and touch
the remaining lead at each of the alphabetically