Hamworthy Sherborne S65 S70C Boiler Hot Surface Igniter Assembly 563801011

Product Overview

The Hamworthy Hot Surface Igniter Assembly (Part Number: 563801011) is an electrical ignition component designed for Hamworthy Sherborne S65 and S70C gas-fired boilers.

The igniter forms part of the boiler's combustion and ignition system, providing the heat required to ignite the gas and air mixture during the burner start-up sequence.

Unlike a conventional spark electrode, a hot surface igniter uses an electrically heated element to initiate combustion.

Correct igniter operation is important for reliable burner ignition and the normal operation of the boiler's combustion system.

ℹ️ Product Condition Options:

This part may be available in New or Refurbished condition. Please select your desired option from the dropdown menu above. Refurbished igniters should be professionally inspected and electrically tested to confirm their condition and suitability before installation.

Technical Insight & Common Failure Symptoms

The hot surface igniter operates by heating an electrical element to a temperature sufficient to ignite the gas and air mixture when the boiler's control system initiates the ignition sequence.

Over time, the heating element may deteriorate due to repeated heating cycles, thermal stress, contamination or electrical faults.

Possible symptoms that may indicate a hot surface igniter or associated ignition problem include:

• Boiler failing to ignite during the normal start-up sequence.

• Igniter failing to heat when ignition is requested.

• Intermittent or unreliable burner ignition.

• Repeated ignition attempts without successful flame establishment.

• Boiler entering an ignition-related safety lockout.

• Visible cracks or deterioration affecting the igniter element.

• Damaged or deteriorated electrical connections.

• Ignition faults identified during professional testing.

These symptoms do not necessarily confirm a faulty hot surface igniter, as similar problems may result from the gas valve, ignition controller, wiring, gas supply or other combustion components. Correct professional diagnosis should be carried out before replacing the igniter.

Safety Advice

Boiler hot surface igniters are safety-related components within gas-fired heating appliances. Inspection, removal and installation must only be carried out by a Gas Safe registered engineer who is suitably qualified for the appliance and work being undertaken.

Always isolate the appliance's electrical and gas supplies before carrying out any work. Allow the burner and ignition components to cool completely before handling.

Follow the manufacturer's installation and servicing instructions. Ensure the correct igniter is fitted and avoid touching or damaging the sensitive heating element.

Appropriate electrical safety, ignition, flame supervision, combustion and operational safety checks must be completed before returning the boiler to service.