descaling coffee machine

pyjamaleg

"I'd suggest trying to run through the descaling programme as per your machine instructions, using only water, and see if that sorts out the problem."

If your problem is the descale warning light, and all you want to do is make it stop, this will definitely work. Your machine doesn't know what you have fed it. It only knows that the descale programme has been run.
It will not, of course, do anything to clean your machine's insides.