Vaillant VR 66 Two Zone Wiring Control Centre 0020135785

Product Overview

The Vaillant VR 66 Two Zone Wiring Control Centre (Part Number: 0020135785) is an electronic heating control accessory designed for use with suitable Vaillant heating systems.

The VR 66 forms part of the heating system's wiring and control arrangement, allowing separate heating zones to be managed through the appropriate connected controls.

The wiring centre provides connections for heating control components and supports the coordination of zone heating demands within the 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 units should be professionally inspected and electrically tested to confirm correct operation before installation.

Technical Insight & Common Failure Symptoms

The VR 66 wiring control centre forms part of a zoned heating control installation. It provides electrical connections between the compatible heating controls and associated system components.

In a two-zone heating arrangement, different areas of a property can have separate heating demands, allowing the system to respond according to the selected control settings.

A fault affecting the wiring centre, connected controls or electrical connections may interfere with normal zone operation.

Possible symptoms that may require investigation of the wiring centre or associated controls include:

• One heating zone failing to respond to demand.

• Heating zones not operating according to their programmed settings.

• Intermittent heating zone operation.

• Zone control components failing to respond correctly.

• Electrical connection or control-related faults.

• Heating operation not matching the selected thermostat settings.

• Unexpected operation of connected zone components.

These symptoms do not necessarily confirm a faulty wiring centre, as similar problems may result from thermostats, zone valves, wiring, control settings or other heating system components. Correct professional diagnosis should be carried out before replacement.

Compatibility

This part (MPN: 0020135785) is identified as the Vaillant VR 66 Two Zone Wiring Control Centre.

Please verify the heating system's control configuration, electrical connections and part number against Vaillant's technical documentation before ordering to ensure correct fitment.

Safety Advice

Heating wiring centres and associated electrical control components should only be inspected, removed or installed by a suitably qualified and competent heating engineer or electrical professional.

Always isolate the relevant electrical supplies before carrying out any work and follow the manufacturer's installation and wiring instructions. All connections must be correctly installed, and appropriate electrical, heating control and operational safety checks must be completed before the system is returned to service.