Numatic Accessory Port Flow or Suction Fault

On models with separate accessory sockets, external wand tools do not operate correctly when connected.

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Possible Causes

Blocked accessory port, Incorrect hose connection, Internal diverter valve stuck, Leak at accessory coupling

How to Fix / Troubleshooting

Safety first: Unplug the machine before changing hose connections.

  • Verify connections: Ensure the accessory hose is connected to the correct port and fully engaged.
  • Clean port: Inspect and clear any debris from the accessory suction and solution ports.
  • Check diverter valve: If your model uses a valve to switch between floor and accessory modes, operate it several times to free it. Service if stiff.
  • Inspect couplings: Replace any worn O-rings or damaged couplers that may cause leaks.
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Repair Difficulty

Easy 2/5

Required Part

Accessory Port Diverter Valve
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