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Canning -- Miscellaneous

Why is steam leaking around the lid of my canner?

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Several things could cause steam to continue to escape from around the lid of the canner and not allow the pressure to build. If steam continues to leak around the lid at the site of one of the handles of a Mirro canner that has a lid lock mechanism under the handles, it is because the lid lock mechanism has not seated itself completely. You may be able to remedy this by gently shaking or moving the canner from side to side. If that fails, you will need to let the pressure return to zero naturally, open the canner and jiggle the lid lock mechanism and dry the area around the mechanism. Another cause for steam leakage is a poorly fitting sealing ring or gasket. Let the pressure return to zero, remove the lid and gasket. Gently stretch the gasket while drying it. Dry the groove in which the gasket rests. Replace gasket in reverse position and try again. If this doesn't work, purchase a new gasket.

PREPARED BY: Angela M. Fraser, Ph.D., Associate Professor/Food Safety Specialist, and Carolyn J. Lackey, Ph.D., R.D., L.D.N., Professor/Food and Nutrition Specialist, North Carolina State University (August 2004)

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