Ferroli Optimax 25S 25OV 25C Boiler Gas Valve 39810420

Product Overview

The Ferroli Optimax Boiler Gas Valve (Part Number: 39810420) is a gas control component intended for selected Ferroli heating systems.

The gas valve forms part of the boiler's combustion system, controlling the supply of gas to the burner in accordance with the appliance's operating requirements.

It operates alongside the boiler's electronic controls and combustion components to support controlled ignition and burner operation.

Correct gas valve operation is essential for safe and reliable boiler performance.

ℹ️ Product Condition Options:

This part may be available in New or Refurbished condition. Please select your desired option from the dropdown menu above. Any refurbished gas valve must be professionally inspected and tested to confirm that it meets the required operating and safety specifications before installation.

Technical Insight & Common Failure Symptoms

The boiler gas valve is a safety-critical component responsible for controlling gas flow to the burner during the appliance's operating sequence.

The valve works in conjunction with the boiler's ignition system, electronic controls and combustion components. A fault affecting the gas valve or its associated connections may prevent the burner from operating correctly.

Possible symptoms that may indicate a gas valve or associated combustion system problem include:

• Boiler failing to ignite or fire correctly.

• Burner failing to establish or maintain a flame.

• Intermittent burner operation.

• Boiler entering an ignition-related safety lockout.

• Boiler failing to respond correctly to heating or hot water demand.

• Gas valve failing to operate when correctly commanded.

• Electrical or control-related faults affecting burner operation.

These symptoms do not necessarily confirm a faulty gas valve, as similar problems may result from ignition electrodes, gas supply issues, wiring, electronic controls or other combustion components. Correct professional diagnosis should be carried out before replacement.

Compatibility

This part (MPN: 39810420) is associated with selected Ferroli Optimax boiler systems.

Please verify the exact boiler model, GC number, part number, gas type and valve specifications against the manufacturer's technical documentation before ordering to ensure correct fitment.

Safety Advice

Boiler gas valves are safety-critical components within the appliance's gas and combustion system. Inspection, removal, installation and adjustment must only be carried out by a Gas Safe registered engineer who is suitably qualified for the appliance and fuel type.

Always isolate the appliance and gas supply before carrying out any work and follow the manufacturer's installation and servicing instructions. The gas valve must be correctly installed and commissioned in accordance with the manufacturer's requirements. All necessary gas-tightness, combustion analysis, burner operation and operational safety checks must be completed before the boiler is returned to service.