F7
Vax Internal Leak / Leak Sensor Activation

F7 displayed, solution leaks internally, machine may cut out with error

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Safety Warning

This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.

If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.

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Possible Causes

Cracked solution hose, Loose hose clamp, Perished O-ring on solution connector, Activated leak sensor pad

How to Fix / Troubleshooting

Safety first: Unplug the machine and remove both water tanks. Mop up any visible water around the base.

  • Inspect base for leaks: Remove the bottom cover to expose internal hoses and connectors. Look for signs of dried detergent, corrosion, or wet areas.
  • Check solution hoses: Follow the clear solution hose from the tank valve to the pump and from the pump to the spray bar. Look for splits, kinks, or loose push-fit connectors.
  • Replace damaged hoses or seals: If a hose is cracked or a connector O-ring is perished, replace with the correct Vax hose or seal kit.
  • Dry leak sensor: Some models have a leak sensor pad or float at the base. Dry it thoroughly with a cloth and allow the machine to air dry for several hours.
  • Reassemble and test: Refit covers, refill the tank, and test for leaks over a sink or tiled floor. If F7 reappears, further professional inspection is advised.
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Repair Difficulty

Hard 4/5

Required Part

Solution Hose Kit
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