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There are two possible causes that Energy Safety can speculate on without further information:
- A foreign body was located on the burner of the water heater causing the water heater to ignite explosively. The hot pipe may have been disconnected by this explosion and this would have caused the burner to keep running while letting water into the property. This incident could have been caused by lack of maintenance.
- The hot pipe disconnected from the water heater for another reason, causing the water heater to work in the normal way, which could be considered out of control as water would have been entering the dwelling.
Energy Safety closed the event as one of the possible reasons for the incident is not a gas incident. It also may be due to lack of maintenance.