Errors

• - select type -
• GWB8-042IE-2
• GWB8-075IE-2
• GWB8-112IE-2
• GWB8-150IE-2
• GWB8-187IE-2
• GWB8-225IE-2
• GWB8-245E-2
• GWB8-262E-2
• GWB8-280E-2
• GWB8-299E-2
• GWB9-050IH-2
• GWB9-075IH-2
• GWB9-100IH-2
• GWM-050IE
• GWM-075IE
• GWM-100IE
• GWM-150IE
• GWM-200IE

• - select code -
• A00
• A01
• A05
• A06
• A08
• A09
• A10
• A11
• A12
• A13
• A14
• A18
• A20
• A21
• A22
• A23
• A24
• A27
• A28
• A29
• A30
• A35
• E31
• E32
• E33
• E34
• E36
• E40
• E43
• E44
• E45
• E46
• E47
• E51
• E52
• E57
• E59
• E60
• E65
• E66
• E73
• E74
• E75
• E76
• E77
• E78
• E79
• E81
• E88
• E89

Boiler type GWM-200IE

Error code A05

Cause:

GV relay error. 

Solution:

1. Is harness connected to Gas Valve? Is harness connected to Control Module J13?
Yes: -> 2
No: Connect harness

2. Disconnect harness from Connect harness Control Module J13. Measure resistance across J13-3 and J13-4. Is resistance between 1.0 and 1.2 kohms?
Yes: Replace Control Module.
No: ->3 

3. Disconnect harness from Gas Valve. Does each wire have continuity between Gas Valve and Control Module?
Yes: Replace Gas Valve
No: Replace harness