cold water tap

[choirfran]

Hi I have a problem with the cold water tap in my bathroom. All the other taps work fine but suddenly there is no water coming out of the cold tap on the sink. I have checked the filter on the end, no broblem there. It is a 2 tap 1 spout type. Please can someone advise me what I can do.

 

[rocketmanbkk]

Air lock

Try holding your hand over the spout & turning the tap on. Hold it for a while & see what happens

 

[Best]

As above, you could try holding your hand over the spout end and opening both taps and hold for a few seconds. Be careful if the hot water is very hot. It is worth a try, but these modern mixer taps don't usually mix the water like the old taps did.
You could also just have a faulty cartridge on the cold side. Washer could be stuck, or works have slipped apart inside and needs stripped, some silicone grease and put together again if you are lucky