Why has my bathroom cold water tap (but no others) stopped working? [solved]
The basin cold water tap in my bathroom over the last week has gone from fully flowing, to half pressure, to a dribble, then to a drip and now nothing comes out.
The 3 other taps in the bathroom work correctly, including the cold water tap on the bath.
Are there a series of simple things to check before calling out a plumber?
I could be that the connection between the handle and the actual valve is bad - either it's loose, or stripped.
Is it possible to take the handle off (I'm assuming you have a separate hot & cold handle from the question) to check the condition? Once it's off, you should be able to use a pair of plyers to try to open the valve directly.
If that doesn't work, check the shut-off valve under the sink - if as @aphoria mentions it's something blocking the line, that's another place to check. Turn it off, then back on again, which may dislodge the blockage.
We just had this happen - there was an airlock in the cold water pipe to that tap. As the tab was a mixer (two knobs, one spout), a simple solution is to put your thumb over the end of the spout, open the cold water completely (nothing happens) and then turn the hot water on. Blocking the spout means the hot water is routed back up the cold pipe, eliminating the air lock.
Use a cloth/rag if your hot water is too hot to keep your thumb over the end - it takes a minute or two.
There may be some sediment blocking the line. Many faucets have a small filter right at the end (where the water comes out) that you can unscrew and clean out. Check that first.
I just had a problem with my cold water faucet in my bathroom sink. It quit working out of nowhere! My shower faucets worked just fine. I put a plastic bag over my sink faucet with a little hot water running. Pretty much suffocating my faucet. Gave it a few seconds and now the cold water runs back!
It could very well be a frozen pipe if you live in a cold area.
For us it was a frozen pipe. We actually noticed the water was not running and immediately found a spot where the pipe was close to the outer wall in the basement where insulation was missing. We were lucky and used a blow dryer to heat the pipe and we now will be insulating around it. Glad the pipe did not burst!
how to fix Low or No water pressure for the kitchen or bathroom faucet in no time
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