Buderus Logamax plus GB142-24 Servicing Instructions page 55

Blocking boiler fault code 3A-2Blocking boiler fault code 3F
page 54
23
Check the supply cord of the blower
(120V AC). See page 87.
Is the supply cord okay?
Yes
44
page 83
3 F 2 7 3
Fully switch off the heat request and check
that the blower is still operational after
1 minute.
Is the blower
still operational?
44
page 83
Logamax plus GB142-24/30/45/60 - We reserve the right to make any changes due to technical modifications!
No
The blower is switched off during the safety
test.
No
Yes
Replace the supply cord.
Locking boiler-fault code.
Diagnosis
8
page 31
8
page 31
7
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