The gas valve relay is defective press the reset button and apply burner start, wait to see if fault reoccurs, if it does the gas valve needs replacing.

Open the main shut off valve, shut down the appliance and check gas line, replace the ionisation electrode, set burner correctly and minimum rated load, check the integrity flue system and if the interconnected room air supply is too small, or the size of the ventilation opening is too small, clean the heating block on the flue gas side or replace the control unitburner control unit.

If the fault occurs repeatedly, the setting of the CO2 valves need checking.

Which is why its best to be protected should anything unforeseen happen to your own heating system.

Boiler Plan (UK) Limited trading as Boiler Plan is a credit broker and is Authorised and Regulated by the Financial Conduct Authority FRN 692584.

Credit is provided by a panel of lenders with whom we have a commercial relationship (so we cannot provide independent advice).

VAT No. 208666101.

Registered Address: Boiler Plan UK Ltd, Unit 11 Easter Park, Baker Road, Northumberland NE23 1WQ.

Worcester Boiler Y-S Module