Technical data

Thermo 230 / 231 / 300 / 301 / 350 5 Troubleshooting
507
5.3.2.7 Fault Symptom "Solenoid Valve Defective"
Is solenoid valve supplied
with electrical power ?
YES
NO
Is components test with diagnostic computer o.k.
(audible click of solenoid valve)?
Make electrical connections.
Control unit defective, replace.
Does fuel leak from nozzle in run-down?
Replace solenoid valve.
Investigate reason for response
(e.g. check exhaust system)
Has safety thermostat responded ?
(Thermo 231/301 only)
Safety thermostat defective,
replace.
Replace solenoid valve.