The manufacturer of electric mowers for Greenworks and Kobalt recalled 28,000 mowers today because the circuit boards can short circuit and catch fire. Twelve incidents have been reported, including five fires, according to the recall notice from the Consumer Product Safety Commission. The recalled models are the Greenworks G-Max 25302 and Kobalt KM2040X-06.

Both walk-behind mowers have 40-volt lithium-ion batteries. They were made by Hongkong Sun Rise Trading Ltd. of China and sold for about $350 at Lowe’s and on Lowes.com, as well as other walk-in and online retailers, including Amazon.com, from May 2014 to July 2016.

Consumer Reports tested the Greenworks G-Max 25302 and Kobalt KM2040X-06 push mowers with 20-inch decks and did not encounter battery problems during our tests. Their mowing performance was mediocre, and neither made our recommended list. The Kobalt model has since been discontinued.

What You Should Do

If you own one of these models, remove the battery to cut power to the circuit board and stop using the mower. Then contact Hongkong Sun Rise Trading at 888-266-7096 or greenworkstools.com to arrange for a free repair at a nearby repair shop. You’ll need to take your mower in, and the company will replace the circuit board.

In addition, report any problem you’ve had with one of these mowers at SaferProducts.gov.

To find an electric mower or gas mower that performed well in Consumer Reports’ tests, check our lawn mower ratings and recommendations. Our top electric push mower is the Ego LM2101, $500.