Flame monitor
â–¶ How to fix
Check the fuel supply.Check that the exhaust pipe for the combustion air fan is not blocked.Check the combustion chamber.Check the flame monitor.Check the glow plug. See Internal wiring diagram under Connections. Measurement points 1 and 2 in connector B for the control unit. Resistance:2 +/- 0.2 ohm.Instructions for the checking procedures are found in the work description in Multi under 18-90 "H13, ATA Auxiliary heater - Air".
What you'll see
No driver-visible symptom recorded.
System reaction
No system-reaction text recorded.
Diagnostic depth
Detection
Flame disappears in LOW mode.
Possible cause
The flame disappears when temperature exceeds 95°C on ATA 1 or 80°C on ATA 2 and the auxiliary heater is set to LOW.