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E133

Gas supply or ignition fault

Baxi identifies E133 as a gas-supply/ignition fault involving the supply, sensing electrode, spark electrode or associated cable.

What this code means

Baxi identifies E133 as a gas-supply/ignition fault involving the supply, sensing electrode, spark electrode or associated cable.

Possible causes

  • Gas supply interrupted
  • Ignition electrode or cable fault
  • Flame-sensing electrode fault
  • Gas valve or combustion issue

Common symptoms

  • E133 displayed
  • Boiler fails to ignite
  • No heating or hot water

Checks to make

  1. Check whether gas is available to other appliances if safe
  2. Do not repeatedly reset
  3. Arrange Gas Safe/qualified diagnosis if supply is present

Safety

  • Do not remove the boiler casing or work on gas, combustion, flue or internal electrical components unless appropriately qualified. If gas is suspected, follow the national gas-emergency procedure.

Model notes

Baxi fault-code availability varies by boiler family and control platform.