Rainbow making foam

Have you ever wondered why your Rainbow Vacuum suddenly starts producing foam and stops working? It’s a common concern among users, but it’s important to know that this is not necessarily a sign of a broken machine. In this article, we’ll explore the reasons behind this phenomenon and provide step-by-step instructions on how to address it effectively.

Why Does My Rainbow Vacuum Produce Foam?

The production of foam in your Rainbow Vacuum is often a result of using excess fragrances, non-recommended disinfectants, or cleaning liquids in the water basin. The Rainbow Vacuum is designed to use water as a filter, and the addition of other substances can disrupt its normal operation, leading to the formation of foam. This foam can cause the vacuum to stop running as a safety measure to prevent spilling and potential damage.

Steps to Address Foam Formation

If you find that your Rainbow Vacuum is foaming and has stopped working, follow these steps to resolve the issue:

  1. Power Off and Unplug: For safety purposes, always turn off and unplug your vacuum cleaner before performing any maintenance.
  2. Remove and Empty the Water Basin: Detach the water basin from the vacuum and empty any excess water or foam present.
  3. Clean the Basin: Rinse the water basin thoroughly to remove any soap, disinfectant, or fragrance residues. Before reattaching it to the vacuum, refill the basin with clean water only.
  4. Inspect and Clean the Water Separator: Check the water separator located on the motor unit for any foam or debris accumulation. Clean it carefully if needed.
  5. Reassemble and Test: After cleaning, reassemble your vacuum and turn it on to check if it operates normally.

Preventing Future Foam Issues

To prevent foam formation in your Rainbow Vacuum, it’s crucial to use it as intended. Here are some tips:

  • Use Approved and tested Safe Fragrances: If you wish to add fragrances, only use those approved by Rainbow or the ones we already tested and are safe for Rainbow Vacuums, and in small amounts.
  • Avoid Harsh Chemicals: Refrain from adding disinfectants or cleaning agents that are not recommended by the manufacturer or not safe for your Rainbow Vacuum.
  • Regular Maintenance: Regularly clean your vacuum, including the water basin and separator, to ensure optimal performance.


Understanding the cause behind foam formation in your Rainbow Vacuum and how to address it can save you from unnecessary worries and potential repairs. By following the above steps and using your vacuum as recommended, you can ensure its longevity and efficient performance. Remember, the key to preventing foam is to use your Rainbow Vacuum as intended, with water being the primary element in its filtration system.

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