Users of three out of five steam cookers tested are at risk from electric shock or burns, the council warns.
Tests found problems with Tefal, Antec and Evertop models, which either had internal live parts too close to the outer casing of the steamer, sub-standard provisions for electrical earthing or were poorly made.
The council's Dr Lo Chi-kin said householders with any of these cookers should use them carefully and stop using them if they noticed anything unusual in their operation.
He said that while the cookers had failed safety tests, the risk of injury to users was low.
The results have been passed to the Electrical and Mechanical Services Department for further action.
A department spokeswoman said discussions were being held with suppliers, 'but preliminary assessment shows there should be no imminent danger'.