Why does my fryer overflow or foam up during use?

Overflow or heavy foaming often means the oil is contaminated with water, the fryer has been overfilled, or the food load is too large. The manuals warn that water in contact with oil can cause the contents to splash, effervesce or overflow excessively.

1. Switch the fryer off and leave it to cool without moving it. Expected result: the foam should subside as the oil settles. If it keeps rising or spilling, stop using the appliance.
2. Check the oil level against the minimum and maximum marks. Expected result: the level should sit safely within the indicated range. If it is too high, do not use the fryer until the oil has been removed to a safe level.
3. Consider whether frozen food, washed food or a not-fully-dried bowl may have introduced water. Expected result: dry food and a completely dry bowl should reduce the problem. If the oil still foams aggressively, stop using the fryer.
4. Look for signs that the oil is old, dark or has an unusual smell. Expected result: fresh oil should behave more predictably. If the fryer continues to overflow after normal checks, contact the retailer or store where it was purchased.

Do not add water to calm the oil. If the fryer has overflowed onto the worktop or any electrical part, stop using it immediately until it is fully cooled and inspected.