By Jennifer Clarke Personal finance reporter, BBC News

Asda started selling the Durabrand model in July 2006

The supermarket said three customers had reported problems with the XB2316 model, which retailed for �22.75.

The product was not manufactured with batch numbers, so Asda has decided to recall the entire range.

Customers have been urged to stop using the appliance, and take it back to any Asda store for a full and immediate refund.

Fault

They do not need to return the box or produce a receipt.

Recall notices will be put up in stores on Friday and press advertisements will run on Saturday.

Asda said its initial investigation had uncovered a fault with the "Durabrand" microwave's timer mechanism.

No customers have been hurt.

"Even though this is only three microwaves, we take this sort of thing very seriously indeed, and that why we have taken the decision to recall all these microwaves," said spokesman Ed Watson.

"All customers need to do is bring them back to the store and we'll give them a full refund.

"It goes without saying we are very sorry indeed," he added.

Customers can get more information from Asda's consumer helpline on 0500 100 055.