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No Heat, No Hot Water? Understanding Boiler Error Code E133

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By Leon Kasem

It’s a frustrating situation: you wake up, and there’s no heating or hot water in your home. This is a common issue that many homeowners face, and often, your boiler will display an error code to help indicate the problem. Boiler Solutions can help you fix any boiler issue in London.

What Does Error Code E133 Mean?

If you have a Baxi EcoBlue combination boiler and you see the error code E133 displayed, it signals an ignition lockout fault. This essentially means that your boiler has tried to ignite the flame necessary for heating water or radiators but has been unsuccessful, and it has locked itself out as a safety measure.

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Potential Causes of an Ignition Lockout Fault (E133)

An ignition lockout fault can stem from several points within your heating system. According to a recent service call, the potential issues range broadly, indicating that gas is not successfully igniting in the boiler. Here are some areas where the problem might lie:

  • Gas Meter Supply: There might be an issue with the gas coming into your property from the meter.
  • Gas Valve: The gas valve inside your boiler, which controls the flow of gas to the burner, could be faulty.
  • Ignition Process Components: This refers to the parts directly involved in sparking and maintaining the flame.

Initial User Troubleshooting: The Reset Button

When faced with an E133 error code, many homeowners first attempt a basic troubleshooting step: resetting the boiler. For a Baxi EcoBlue combination boiler, the reset button is typically located on the right-hand side. To attempt a reset, you would push this button in for 5 seconds and then release it. However, as demonstrated in a recent service case, sometimes this simple reset attempt is unsuccessful, and the boiler does not relight. This indicates a more persistent issue that requires further investigation.

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Expert Diagnosis and Resolution

When a boiler reset doesn’t work, it’s time for a professional diagnosis. In one specific instance concerning a Baxi EcoBlue combination boiler displaying the E133 error code and failing to relight after a reset, further investigation by heating experts revealed a clear culprit.

The problem was found to be a faulty ignition probe. This crucial component, often located on the left-hand side of the boiler, is essential for the ignition process. Once the faulty ignition probe was identified and replaced, the boiler was ready to be reset and relit, allowing for testing of both the hot water and heating functions.

Boiler error codes like E133 provide valuable clues about what’s going wrong with your heating system. While a simple reset can sometimes fix minor glitches, persistent ignition lockout faults often point to internal component failures, such as a faulty ignition probe, that require professional attention. If you’re experiencing a similar issue, always consider contacting a qualified heating engineer for a thorough diagnosis and repair.

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