The Consumer Product Safety Commission yesterday announced agreements with three appliance manufacturers that will cause them to voluntarily modify thousands of 14-cubic-foot refrigerators which present possible shock hazards if not properly grounded.

Magic Chef, Inc., Kelvinator Appliance Co. and White-Westinghouse Co. all agreed to modify units.

"These refrigerators may contain an improperly placed heater wire which could, under some circumstances, contact the refrigerator cabinet or evaporate, thereby presenting a possible shock hazard to a consumer touching the refrigerator," the CPSC said in a statement.

All three companies emphasized that no accidents have been reported regarding the refrigerators.

The unit subject to modification are listed below:

White-Westinghouse: Model numbers RT146T, RT 145T, R141T, RT144T, RT14XW and RT14YW. Only those refrigerators bearing serial numbers commencing with the letters RUD, RUE, RUF, RUG, RUH, RUJ, RUK, RUL and RTG followed by five numbers are affected.

Kelvinator: Model number FB 148 with serial numbers commencing with the letters of RUH, RUJ, RUK, and RUL followed by five numbers.

Consumers can find the model and serial numbers on the serial plate located on the lower left-front corner of the refrigerator above the kick plate grating. The serial plate is visible only when the refrigerator door is open.

When opening the door, consumers are cautioned not to touch any other kitchen appliance or the sink.

Consumers with units involved should contact the dealer from whom it was purchased for inspection and repair at no charge to the consumer.