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Hot water comes on but then runs cold after a minuate then goes hot again. The water appears to be hotter downstairs

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If you have lukewarm water.. and at times it's hot.. then warm. or after running hot for a while and it cools.. chances are you have a cracked or failing dip tube.

The dip tube is just what it sounds like. a tube that delivers cold water to the bottom of the tank.. to mix with the hot water.. this keeps the hottest water at the top for faster delivery.

If this tube is cracked near the top.. or along it's length.. you may get some hot water.. then cold.. then warm..etc etc.

They are inexpensive to replace.. but as always exercise caution and follow proper procedure to relieve pressure, water supply and power/fuel before attempting a repair.

Generally this tube is inserted right where the cold water inlet pipe is on the heater.

A good plumber or water heater replacement or repair company could inspect fix and replace for a lot less than a new water heater.

Best of luck

Posted on Apr 10, 2011

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