Question 3: What are some common causes of error code 133 in a combi boiler?

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Grade: Education Subject: Support
Question 3: What are some common causes of error code 133 in a combi boiler?
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Error code 133 often indicates a problem with the combi boiler's control system, potentially related to water level sensors, heating element functionality, or a fault within the control module. Further diagnostics are needed.