Vaillant TURBOmax VUW 242/1E 282/1E Diverter Valve Repair Kit 140352 OEM

Product Overview

The Vaillant Diverter Valve Repair Kit (Part Number: 140352) is a service kit designed for the diverter valve assembly fitted to selected Vaillant TURBOmax VUW 242/1E and 282/1E combination boilers.

The kit is intended for servicing and repairing components within the diverter valve mechanism, which directs heated water between the central heating and domestic hot water circuits according to boiler demand.

It provides a repair option for the existing diverter valve assembly where the relevant internal components have deteriorated or become damaged, subject to professional inspection and diagnosis.

This is a diverter valve repair kit rather than a complete diverter valve assembly.

ℹ️ Product Condition Options:

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

Technical Insight & Common Failure Symptoms

The diverter valve is a hydraulic component responsible for directing heated water to the appropriate circuit when the boiler receives central heating or domestic hot water demand.

Over time, internal diaphragms, seals and other moving components may deteriorate, potentially affecting valve movement, sealing and water distribution.

Possible symptoms that may indicate a diverter valve or associated hydraulic problem include:

• Domestic hot water failing to reach the required temperature.

• Central heating failing to operate correctly.

• Radiators warming unexpectedly during domestic hot water demand.

• Intermittent domestic hot water performance.

• Diverter valve sticking or failing to change position correctly.

• Water leakage around the diverter valve assembly.

• Deteriorated diaphragms, seals or other internal valve components.

• Incorrect distribution of heated water between the heating and hot water circuits.

These symptoms do not necessarily confirm a faulty diverter valve, as similar problems may result from circulation issues, electrical controls, flow detection components or other hydraulic faults. Correct professional diagnosis should be carried out before fitting the repair kit.

Safety Advice

Boiler diverter valve repair kits and associated hydraulic components should only be installed by a suitably qualified Gas Safe registered engineer who is competent to work on the relevant appliance.

Always isolate the appliance's electrical supply and relevant water connections before carrying out any work. Allow the system to cool and safely release residual pressure before dismantling the diverter valve.

Follow the manufacturer's servicing instructions and ensure that all supplied components are correctly installed. Appropriate leakage, pressure, water circulation and operational safety checks must be completed before returning the boiler to service.