A total of 21 popular washing machine models are being recalled – over fire risk fears.
They are the latest Whirlpool models to be recalled.
The company has added 21 additional Hotpoint and Indesit models to a product recall it started in January.
The firm’s vice-president apologised for the “worry and inconvenience” caused to customers.
He revealed there was an issue with the heating element of machines in warmer washes.
The Office for Product Safety and Standards (OPSS) said the company has estimated the latest additions will affect up to 55,000 machines on top of more than 500,000 originally identified.
Whirlpool said it was contacting affected customers whose details it has, and urged anyone who thinks they have one of those listed to use the “check my model” button on the website or call the customer service team on 0800 316 1442.
Concerned customers are warned to avoid risks by unplugging their machine completely, but anyone who does continue to use it is advised to only use cold water cycles of 20 degrees Celsius or lower.
Whirlpool VP Jeff Noel said: “I want to apologise sincerely for the worry and inconvenience I know this will cause, especially during these difficult times.
“I’d also like to reassure you that we are working as quickly as we can to provide solutions to affected customers as soon as possible.