Service manual

27
Installation and Service Manual
COMPONENT DIAGNOSTICS
FLOWCHART
BEGIN
Remove thermistor leads
from circuit board. Con-
nect OHM meter to
thermistor.
Place thumb on tip
of thermistor.
Does OHM reading
decrease to 7,000 to
10,000 OHMs?
Replace
Thermistor
Apply ice to
thermistor tip.
Does OHM reading
increase to 25,000 to
36,000 OHMs?
Replace
Thermistor
NO
NO
Thermistor OK.
END
Yes
NOTE: THE RESISTANCE
CHANGE IS NOT
INSTANTANEOUS!!
There may be a delayed response
to temperature change opposite of
the evaporator temperature.