The company at the center of a string of faults with TV broadcasts over the past week has said sorry to deaf and blind viewers as issues continue to affect subtitles and audio description.
Red Bee Media said it understands “the challenges” viewers are facing.
“We share your frustration and are working tirelessly towards a solution,” it said in a statement on Twitter.
The company handles playout services and broadcasting technology for a number of channels.
The problems began on Saturday, caused by an “activation of the fire suppression systems” at the company’s headquarters in London, it said.
Channel 4 has had particular issues, with the BBC and Channel 5 also are among those affected.
On Thursday, the technical problems meant E4 was forced to repeat the previous night’s episode of Married At First Sight instead of playing the series finale.
