Trade-ready part listing Verify SKU, product condition and appliance compatibility before ordering.
National Boiler Spares

Viessmann Diverter Valve VCZZ6100/U

Ideal Isar M30100 Diverter Valve Cartridge KEY 174200 Honeywell VCZZ6100/U Product Overview The Ideal Isar M30100 Diverter Valve Cartridge KEY 174200 Honeywell VCZZ6100/U is a critical comp...
Availability Available to order
Product code Not set
Brand National Boiler Spares
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Product information

Technical details

Ideal Isar M30100 Diverter Valve Cartridge KEY 174200 Honeywell VCZZ6100/U

Product Overview

The Ideal Isar M30100 Diverter Valve Cartridge KEY 174200 Honeywell VCZZ6100/U is a critical component designed for specific Viessmann heating systems. This Diverter Valve mechanically directs hot water to either the radiators (heating) or the taps (hot water), ensuring demand priority. properly functioning components are vital for the energy efficiency and safety of your boiler.

ℹ️ Product Condition Options:
This part may be available in New, Refurbished, or Compatible conditions. Please select your desired option from the dropdown menu above. All refurbished parts are professionally tested to ensure reliability.

Technical Insight & Common Failure Symptoms

Based on service data: Diverter valves can become damaged or stuck. This is because they're a moving part and can be oscillating between being open or closed many times a day. Did you manage to get it resolved? I'm facing the same problem and I'm not sure what's causing it. Any advice would be appreciated! Thanks in

Replacing this part often resolves the following issues:

  • Restores reliable system operation and eliminates fault codes.
  • Resolves specific failure symptoms such as component malfunction.
  • Ensures safety compliance and efficient boiler performance.

Compatibility

This part (MPN: VCZZ6100/U) is designed for models within the Viessmann range. Please strictly verify the part number against your boiler's technical manual before ordering to guarantee fitment.

Safety Advice: Boiler parts involve gas, water, and electricity. Installation must be carried out by a Gas Safe registered engineer.