Why is it, that once the water in my bathroom sink becomes hot, it will not allow cold water to flow.?

The water in my bathroom sink runs cold for about a minute, too long in my estimation, and then runs from warm to hot. Once the water becomes hot it stays hot and will not return to cold despite my turning the handle. My husband said it is caused from a clog in the pipe, is he correct?
B.T.W. This bathroom is the furthest room from the hotwater heater and I do not have this problem with the bathtub.

Answers:
IF THE SINK FIXTURE IS A SINGLE HANDLE FAUCET, THEN THE PROBLEM IS THE MIXER VALVE CARTRAGE IS IN NEED OF REPLACEMENT, FOLLOW THE MANUFACTURES INSTRUCTIONS FOR THE REPLACEMENT.

Other answers:
Your husband can be right on. If you have old galvanized steel pipes it can affect many things beside water temp. You can loose pressure, have rusty sediment or a host of other issues. It can also be that the pipes for both cold and hot may be installed along side each other in direct contact. When the hot water gets hot it warms the cold pipe making it feel like its not running cold. If this is the case, you can simply place some foan insulation in between the pipes to keep them seperate.
Your husband can be right on. If you have old galvanized steel pipes it can affect many things beside water temp. You can loose pressure, have rusty sediment or a host of other issues. It can also be that the pipes for both cold and hot may be installed along side each other in direct contact. When the hot water gets hot it warms the cold pipe making it feel like its not running cold. If this is the case, you can simply place some foan insulation in between the pipes to keep them seperate.
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