Buderus Logamax plus GB142-24 Servicing Instructions page 67

Locking boiler fault code 6A -3
page 66
34
Check the following elements for soiling,
damage and correct assembly:
- the combustion-air inlet conduit
- the air suction tube
- the seal between the Venturi and the blower
- the gas orifice, see page 101 and
page 127, table 5
- the blower, see page 86
- the connection between the blower and the
burner
- the burner
- the heat exchanger, see page 117
- the flue gas conduit.
Are the above-
mentioned components clean and
free from damage?
Measure the ionization current.
See page 95.
Is the ionization current
okay?
Logamax plus GB142-24/30/45/60 - We reserve the right to make any changes due to technical modifications!
No
Yes
No
Yes
Clean and/or replace the corresponding
components.
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Diagnosis
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