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Buderus GB 142
Karigiri61
Member Posts: 1
in Gas Heating
I have a Buderus boiler that is 14 years old and so far working with regualar maintenance. We noticed that that there was no heat and hot water about fifteen days ago and the BC 10 controller display show 9L code. I did not further to investigate like clicking service icon on the controller. I checked the manual and there are two display code 934 and 938 associated with 9L. After restarting the boiler it worked fine for two weeks and again stopped working four days ago. Did the same routine restarting and started working. I called my HVAC service and they mentioned I have to replace both gas valve coil and UBA 3. The repair is expensive. Next time it would happen I will click the service button to find out what is display code. Do I need to replace both of them. I am wondering why it would work after power down and power on. I would appreciate any help and advise.
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