The U.S. Consumer Product Safety Commission, in cooperation with Big Lots, has announced a voluntary recall of two heater units, a portable space heater and a portable oscillating space heater.

The recall concerns about 70,500
 of the heaters, which can overheat and melt, posing a fire or electric shock hazard. Big Lots has received four reports of the product overheating and melting. There are no reports of injury, fire or property damage.

The recall is of two models of 1,500-watt Climate Keeper ceramic heaters. Both models have a fan, two dials on top, a wire mesh panel in front and the name Climate Keeper and a label on the bottom with the model number and ETL 3130679. Model FH107A has gray plastic housing. Model PTC-902T is an oscillating heater with silver-gray plastic housing, a molded handle on top of the heater and a small extra button between the two dials which controls the oscillation.

These units were sold exclusively at Big Lots stores nationwide from September 2010 through March 2012. Consumers should stop using the recalled product immediately and return it to a Big Lots store for a full refund.