Kyocera TASKalfa 5551ci - Abnormally High Fuser Middle Thermistor 3 Tempera-Ture; Broken Fuser Center Thermistor 3 Wire

2L6/2N6/2N5/2N4
1-4-128
6320 Abnormally high fuser mid-
dle thermistor 3 tempera-
ture
Fuser middle thermistor 3
detects a temperature higher

Fuser unit 1. Confirm that the wiring connector is
firmly connected and, if necessary,
connect the connector all the way in.
Fuser unit and Engine PWB (YC26)
2. If the wiring is disconnected, shorted or
grounded, replace the wiring.
3. Replace the Fuser unit and execute
U167 counter clear (see page 1-3-112).
Engine PWB 1. Check the engine software and upgrade
to the latest, if necessary.
2. Replace the engine PWB (see page 1-5-
80).
6330 Broken fuser center therm-
istor 3 wire
Fuser center thermistor 3
detects a temperature lower

for 1 s
Fuser unit 1. Confirm that the wiring connector is
firmly connected and, if necessary,
connect the connector all the way in.
Fuser unit and Engine PWB (YC26)
2. If the wiring is disconnected, shorted or
grounded, replace the wiring.
3. Replace the Fuser unit and execute
U167 counter clear (see page 1-3-112).
Engine PWB 1. Check the engine software and upgrade
to the latest, if necessary.
2. Replace the engine PWB (see page 1-5-
80).
Fuser IH PWB 1. Confirm that the wiring connector is
firmly connected and, if necessary,
connect the connector all the way in.
Fuser IH PWB(YC4) and Engine PWB
(YC26)
2. Replace the fuser IH PWB (see page 1-
5-96).
Code Contents Related parts
Check procedures/
corrective measures