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Question DetailsAsked on 12/13/2016

how to fix hot water tap from luke warm to hot

my shower and one sink faucet is only dispensing luke warm water how do I get hot water?

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2 Answers


Assuming you are getting suitably hot water from the same water heater to other locations, if the hot water flow rate is significantly less than the cold when full on, likely a blockage in the pipe somewhere between where that bathroom line comes off the main hot water line - a plumber would have to track it down by opening the line up different places to isolate the trouble spot. Though could also be a non-operative "instant" hot water circulating pump.

If you are getting full flow at the hot faucet just not hot, then if you have a hot water recirulation system maybe the circulating pump failed - in which case flow rate might or might not be decreased depending on pump type and how it is plumbed, but either way you should get hot water if you let it run for a minute or two - just not instant hot as you are used to.

Another possibility is this is due to cold weather, especially if your pipes run through an unheated crawlspace or basement and you are having unusually cold weather outside, in which case the pipe could be losing so much heat the water is only warm by the time it gets to those fixtures. Insulation would be the normal fix in that case.

This can also happen if your pipes corrode up or fill with minerals - though that would be a very slow reduction in flow rate over months or years.

Of course, if that bathroom gets hot water from a separate water heater, then time to check that out.

Here are links to a couple of similar previous questions with answers whioch might help too - all similar but with somewhat different symptoms, for comparison FYI -

Answered 3 years ago by LCD



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Answered 3 years ago by Member Services

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