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I have hot water everywhere in the house but the kitchen sink. I have cold water but no hot. It will trickle in the middle but still cold. Does that mean its frozen or is there something else to check?

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Did you check the shutoff valve under the sink? –  The Evil Greebo Jan 7 '13 at 20:38
    
Have you previously had hot water on the kitchen sink? Have you had it in previous years during the winter, and if so, do you know of anything that's different now? What's underneath the kitchen -- finished/unfinished basement, crawlspace, and is it insulated under the floor (cold space) or around the walls (conditioned space)? Are the pipes copper or pex or something else? –  gregmac Jan 7 '13 at 21:38
    
It sounds like you have some reason to suspect they're frozen, and you should be very cautious of this: because water expands when frozen, it often bursts pipes, but that won't be evident until it thaws out. Unchecked, this means as soon as it thaws it will start flooding inside the wall or floor or whatever, which could in turn cause major damage beyond what's already been done. The best thing to do is turn off the water before the suspected freeze point, figure out where it's frozen, and then thaw, fix any damage, and do what's needed to prevent it from freezing again. –  gregmac Jan 7 '13 at 21:41
    
Be very cautious thawing pipes as well. A house very close by to me burned to the ground when a "plumber" tried to thaw a frozen pipe. –  bcworkz Jan 8 '13 at 0:54

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