Liquid oxygen (LOX) troubleshooting

No oxygen coming from cannula

Probable cause

Decreased awareness of flow.

Solution

Place cannula prongs in clear glass of water. If you see bubbles coming from the cannula, your unit is working correctly.


Probable cause

Loose connection.

Solution

Check each connection from the unit to the cannula to ensure a tight fit.


Probable cause

Flow control is not pointing directly to setting.

Solution

Adjust flow control to point directly to the appropriate setting.


Probable cause

LOX portable unit is empty.

Solution

Fill from LOX dewar.


Probable cause

Dirty or faulty cannula.

Solution

Replace cannula.

No oxygen from cannula when using Helios portable unit

Probable cause

The LOX unit has been overfilled.

Solution

Lay the LOX portable unit on its back and wait for about one hour for unit to defrost.

Portable unit cannot be removed from dewar

Probable cause

LOX units are frozen together.

Solution

Wait 15 to 30 minutes for connections to thaw.

Portable unit does not last as long as usual

Probable cause

Not fully filled. Fill valve stuck open.

Solution

Check you are following fill instructions correctly.

White vapour escaping out of connector after uncoupling

Probable cause

This is normal – the LOX dewar is venting oxygen.

Solution

Immediately reconnect portable to LOX dewar while being careful not to come into contact with the vapour. Wait 15 to 30 minutes for ice to thaw. Remove portable.

Hissing noise from dewar

Solution

This should remedy itself after a few minutes. If it continues please call us.


For all other problems please call us on 0800 373 580

    Re-Ordering Oxygen Cylinders, Liquid Oxygen or Consumables

    To request replacement oxygen cylinders, cannula, mask or consumables, please complete the form below:

    Do you or anyone in your household have cold or flu symptoms?


    If you are requesting a cylinder delivery you can chose a day for your delivery.

    Monday-Friday for North West patients or seven days a week in other areas.


    Please let us know your requirements:

    B10 Large Static Cylinder

    B10 large static cylinder

    Standard Ambulatory Cylinder

    Standard ambulatory cylinder

    Smaller Ambulatory Cylinder

    Smaller ambulatory cylinder
    (only available after a professional medical assessment)

    Liquid Oxygen Dewar

    Liquid oxygen dewar

    Adult Cannula (Curved)
    Adult Cannula (Straight)
    Adult Mask
    Ear Protectors
    Paediatric Cannula
    Paediatric Mask
    Filter for Oxygen Machine
    Tender Grips

    Any other comments



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