9.15.9 Preheater – Overhaul
Preconditions
☑ Engine is stopped and starting disabled.
☑ All preheater power sources are disconnected.
Replacing solenoid switch
u
Replace solenoid switch (→ Page 295).
Cleaning heating element and replacing gasket
u
Clean heating element and housing and check (→ Page 297).
Replacing thermostat
u
Replace thermostat (→ Page 300).
294 | Coolant System, General, High-Temperature Circuit | MS15065/01E 2019-01