9REPAIR
T
HERMO
90 / 90 S
9-4
9.2.3 Replacement of Temperature Limiter
9.2.3.1 Removal
NOTE:
Perform the following procedure only when the
temperature limiter needs replacement.
A functional check has to be performed when the
temperature limiter is installed.
1. Remove heater (see 8.7.1.1).
2. Disconnect electrical connections (see 9.2.1.1).
3. Remove clamp (2, Fig. 9-3) and withdraw protective
cap (1).
4. Using screw driver, lever off retaining clip and
remove temperature limiter (3).
5. Perform procedures on components after
disassembly (see 9.1.1).
NOTE:
Whenever the temperature limiter is removed, it must be
renewed.
9.2.3.2 Installation
CAUTION
Wrong installation will cause melting of the heat
exchanger.
1. Insert the temperature limiter (3, Fig. 9-3) into the
heat exchanger (4) and press down retaining clip.
NOTE:
Make sure the retaining clip is heard to click fully in
place. Only then will the temperature limiter be in the
proper installation position.
If clip does not audibly engage:
• clean seat of the temperature limiter on the heat
exchanger
• clean groove on heat exchanger
• insure that the locking cams are present on both
sides of the spring. Renew temperature limiter if
necessary.
2. Fit protective cap (1) and secure with clamp (2).
3. Torque tighten hose clamp with 1 Nm ± 10%.
4. Make electrical connections (see 9.2.1.2).
5. Install heater (see 8.7.1.2).
9.2.4 Replacement of Temperature Sensor
9.2.4.1 Removal
1. Remove heater (see 8.7.1.1).
2. Disconnect electrical connections (see 9.2.1.1).
WARNING
Escaping hot coolant may cause burns.
3. Unscrew temperature sensor (6, Fig. 9-3) and
remove together with O-ring (5).
4. Perform procedures on components after
disassembly (see 9.1.1).
9.2.4.2 Installation
1. Apply acid free grease (Vaseline) to O-ring
(5, Fig. 9-4).
2. Screw temperature sensor (6) with O-ring (5) into
heat exchanger (4) and torque tighten to
1.5 Nm ±10%.
3. Make electrical connections (see 9.2.1.2).
4. Install heater (see 8.7.1.2).
