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 -
• Err18
• Err2
• Err23
• Err24
• Err29
• Err32
• Err4
• Err55
• Err56
• Err57
• Err58
• Err59
• Err6
• Err60
• Err61
• Err62
• Err63
• Err64
• Err65

Boiler type GWB9-075IH-2

Error code Err23

Cause:

Flame sensed during prepurge ( before gas valve signaled closed) 

Solution: