What does the Johnson Starley E01 fault code mean?

Your boiler has tried to light several times but has been unable to create a flame, meaning you will not have any heating or hot water.

How much does it cost to fix Johnson Starley error code E01?

Typical repair cost for the Johnson Starley E01 fault is £120-£350 including labour.

Check if other gas appliances in your home, such as a gas hob, are working correctly to ensure gas is reaching the property.

Manufacturer manual

Ignition failure

From this model's manual

Verified against the Johnson Starley/Johnson Starley J32 System Et installation & service manual.

This is a high severity fault. Stop using the boiler and call a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.

Boiler cover options

A cover plan would handle faults like E01: no call-out fees, no surprise bills.

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Seeing a different code? Every code this model can display, in one place.

Almost always a stuck diverter valve on combis.

Lockout fault with a reset-needed pattern.

Older boilers — thermocouple, draught, gas supply.