Troubleshootin
g
Error Location Type Description
Cause Solution
Setting the A
or B setpoint
much higher th
an
hose setpoint
can
cause fluid mo
re
than 27° F (15
°
C) over hose
temperature
setting to r
each
the FTS.
Increase hose setpoint so it is closer
to A and B setpoints.
T4DH Hose High
Temperature
Hose
Cold ambient
temperature is
causing hose to
heat.
Cold ambient temperature is chilling
the FTS and causing hose heat to
stay on longer than needed. Insulate
the FTS area of the hose so that it
heats at the same rate as the rest of
the hose.
Overtemperature
switch sensed a
fluid temperature
above 230° F
(110° C).
Heater wa
s delivered too much
power, ca
using the overtemperature
switch t
o open. RTD is not reading
properl
y. After the heater cools
down, re
place RTD. Switch closes
and the e
rrorcanbeclearedwhen
the heat
er temperature falls below
190° F (
87° C).
Disconnected or
loose overtem-
perature switch
cable/connec-
tion.
If heater is not actually over
temperature, check all wiring and
connections between the TCM and
the overtemperature switches.
T4EA Heater A High
Temperat
ure
Switch A
Overt
emperature
swit
ch failed
in th
eopen
posi
tion.
Replace overtemperature switch.
34 333024N
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