Electronic Climate Control Diagnostics

Associated Faults
Other conditions which may exist but will NOT log fault codes:

Condition(s):

No heat

Possible Source(s):
- Airlock in system.

Action(s) to take:
- Fill/bleed procedure

Possible Source(s):
- Heater water pump inoperative
- Coolant flow valve stuck closed

Action(s) to take:
- Check operation & circuit

Possible Source(s):
- Faulty engine coolant thermostat

Action(s) to take:
- Renew as required

One vent falling to open/close

Possible Source(s):
- Broken linkage

Action(s) to take:
- Renew as required

Poor Airflow

Possible Source(s):
- Blower motors - incorrect operation

Action(s) to take:
- Check operation & circuit