I have the 0b fault code occasionally. It happens mostly in the morning when the central heating needs to heat the place several degrees. Seems like switching to hot water is a trigger. Sometimes switching to hot water and back to central heating causes the 0b to show. Other times the fault code 0b is already there and switching to hot water makes it go away. When 0b shows, at all times hot water is available when i open a hot water tap. At all times the pump keeps running. It's just that on central heating the burner will not activate. Sometimes before the 0b shows i can hear the burner try to activate but fails, or the burner runs for 2 sec and stops, then 0b shows. A few times i saw when temperature drops below 50c the burner succeeds to activate and 0b is gone. Could you possibly give me some insights before i start troubleshooting?
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Great instructive video. Thx
I have the 0b fault code occasionally. It happens mostly in the morning when the central heating needs to heat the place several degrees. Seems like switching to hot water is a trigger. Sometimes switching to hot water and back to central heating causes the 0b to show. Other times the fault code 0b is already there and switching to hot water makes it go away. When 0b shows, at all times hot water is available when i open a hot water tap. At all times the pump keeps running. It's just that on central heating the burner will not activate. Sometimes before the 0b shows i can hear the burner try to activate but fails, or the burner runs for 2 sec and stops, then 0b shows. A few times i saw when temperature drops below 50c the burner succeeds to activate and 0b is gone. Could you possibly give me some insights before i start troubleshooting?