New water heater sometimes cold, sometimes hot


Most water heaters upon initial start-up can take several hours to heat the tank water to the setting on the thermostat. Also, if the setting is not at the hottest temperature and it is a large tank 12 hours isn't unreasonable.

You should also be aware that if the entire tank of hot water is consumed for say a long shower it will take the incoming water awhile before it is heated to the set temperature.

If you still feel that there is something mechanically at fault with the new water heater than there is only very few parts that can not function. The first is the thermostat that controls the water temperature. You may have one that is faulty or intermittent. Second is the heating element(s). These actually are responsible for heating the water. They work by becoming extremely hot when electricity is applied to there terminal ends. The heat is then transferred to the surrounding water until the thermostat switches the power off at the proper setting. Heating...

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Our home had two 50 gallon water heaters in series. When one broke, I removed it, and plumbed just the remaining water heater. We planned to replace that one before it went bad, and finally did 2 months ago.

Installed two 50 gallon gas GE water heaters purchased at Lowes. Plumbed them in series as the system was before, and I'm having a bit of an issue.

First, one of the T&P valves was defective. Called GE, got authorization to replace it for free at Lowes, and installed it.

Then...sometimes we seem to get just warm water. Basically just barely warm enough to take a shower, but not hot by any means. Even with the knob turned all the way to hot, its just barely warm. It's very random when it happens, but usually 2 to 4 times per week it'll happen. Sometimes first thing in the morning, and sometimes the morning shower is fine, but then 3 hours later someone will take a shower and it's just warm, sometimes night shower is just warm, etc. We don't really see a...

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distinctive opportunities. it must be the radiator fan is coming near irregularly because of the fact of a undesirable thermal sensor, the thermostat must be sticking, the heater cables, valve, or air flaps must be undesirable. First make effective the entire cooling gadget is working suitable, because of the fact the engine temp is plenty extra significant then the passenger temp. the two radiator hoses must be chilly once you first initiate. the backside one ought to slowly get heat, collectively as the right continues to be chilly till the engine is totally as much as temperature. Then all of sudden the thermostat ought to open and the right hose ought to get too warm for convenience. If no longer, then you definitely the two have low coolant, undesirable thermostat, or air blockage. Then examine the heater valve and controls. there'll the two be a cable or vacuum hose from the administration interior, to the valve interior the engine compartment. Have somebody watch...

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The anode should have nothing to do with that. The anode just prevents your tank from rusting out and springing a leak.

A 45 gallon tank is not very big, esp. if it has a lot of sediment in it. Remember that a shower uses 2.5 gallons of water per minute if it uses a low flow head. That's 25 gallons in 10 minutes, of which maybe 60% is hot water - 15 gallons. So if you take a 10 minute hot shower, you may have used a third of the tank right there.

But that's with a low flow head. An older higher flow head may use 4.5 gallons per minute, or 45 gallons in 10 minutes. Of that 45 gallons, ~27 gallons may be hot water. That would leave less than 18 gallons, which is insufficient for an average bath of 35 gallons or more, meaning ~21 gallons of hot water or more. BTW, I'm guessing my big bathtub uses closer to 50-70 gallons, or 30-42 gallons of hot water.

And that's not even counting the extra hot water required if your incoming water source is colder, like in certain...

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I'm looking to satisfy curiosity rather than fix a problem (because it's not that big a problem.)

I live in a house built in 1937. There have been minimal upgrades to the plumbing. The hot water heater, located in the basement, is maybe 10 years old. The bathroom where we take showers is on the second floor.

Sometimes, the water coming out of the shower head is so hot it has to be blended with cold water to get it to the right temperature. Sometimes, I turn the hot water on full blast and it's a comfortable shower temperature with no cold water added. It is more often the former than the latter, though.

External temperature doesn't seem to be a factor here, as the variations seem to occur throughout the year.

Is there an explanation for...

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It seems logical to expect cold water to freeze faster than hot, but some experiments have suggested the opposite. There’s now a new explanation for why hot water might freeze faster than cold under certain conditions. The phenomenon, known as the Mpemba effect, may be due to the properties of the bonds that link up neighboring water molecules, a team of chemists reports. Yet other researchers contend that the effect doesn’t exist at all.

References to quick-freezing hot water date back to the early days of science: Aristotle reported observing hot water freezing faster than cold. In the 1960s, a Tanzanian student named Erasto Mpemba noticed that ice cream solidified faster when put into the freezer steaming hot. Scientists have proposed a variety of explanations for the phenomenon — now named for the student — including the effects of evaporation, convection currents, and dissolved gasses or other impurities present in the water. But none of...

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Welcome to the forums.

A 40 gal. WH will work fine for 2 people, as long as neither of them feels the need to do a 20 or 30 minute shower!!

One person doing a 7 to 10 minute shower, followed by the other person doing a 7 to 10 minute shower -- BOTH at a ressonable temp. -- that's fine. Just plan on doing laundry and running the dishwasher several hours later. Of course, as soon as the first person taking a shower decides that theirs has to be 20 minutes long at nothing but hot water, the second person is gonna get a cold shower!! Plan accordingly!

The last 60 years of my life have been lived with nothing larger than a 40 gal WH, with a family ranging in size from 1 person to 6, and it's never been a problem. You just have to realize the limitations of the WH and plan accordingly!!

Now, to the problems with YOUR WH!!

Since you have "replaced just about everything there is to replace", let's start at the beginning with a...

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Water heaters and cold weather sometimes don’t play well together.

Most people tend to take longer hot showers in the winter months when it is cold outside. Many experience that during the winter months their water heater starts to run out of hot water and notice they just don’t seem to have as much hot water that is needed for your household or perhaps their water just does not seem to get as hot as it did during the warmer months.

Water heaters work harder in cold weather.

As the outside temperature becomes colder during the winter, it also drops the ground temperature where the water pipes are laid that come to your house. This causes most water heaters to have to work harder to heat the cooler water that is coming in. Once the water is heated and you start to use it in a shower or sink it causes more of the cooler water to come into your water heater that is trying to reach the temperature that you have your water heater thermostat set at. This can be can...

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Here are a couple things to look for:

1) flashing burner light - a flashing burner light indicates the unit is getting an error code
common error codes:
A. continuous flashing - ignition failure or abnormal combustion; look for visible water in the machine indicating a leak, check gas pressure, debris or buildup on flame rod/igniter plug, or clean unit with compressed air
B. 3 flashes - error 16, abnormal outlet water temperature; typically this code indicates you'll need to descale you unit
C. 4 or 5 flashes - exotic error codes; you should contact Noritz technical support to deal with these codes

2. If there is no flashing code, try increasing the hot water flow. In the summer time you typically use less hot water; this can result in intermittent operation of your tankless heater. Increase water flow by either: A. cleaning your showerhead and removing scale deposits B. widening your flow restrictor C. Remove your flow restrictor in the...

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If you installed, or had installed, we offer these options:

Please note, heaters that improperly installed, will not be exchanged.

The following voids warranty, so please be aware:

11 - What about shipping costs and reinstallation
costs? Shipping costs incurred for any reason, and or reinstalltion costs, are not reimburseable to the consumer. 12 - What about warranty issues?

As noted in all print materials, and various places on this website, the water heater has a 1 year warranty on the electronics, as in any type of water heater, and a 15 year warranty against leakage. At time of purchase the consumer has the option of buying an additional one year electronic ...

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What happens if you turn off the small rad that the new rad is linked to?

As the new double rad is much bigger than the single rad it is linked to, the water flowing through them has two choices of route. Go through the big rad, which offers much greater resistance, or take the easy route through the small rad. It's doing the latter.

Try almost closing the lockshield valve on the small rad to increase its resistance to flow to even things up a bit. The lockshield on the small rad should be only open enough to let it heat up properly, no more. Make sure all valves on new rad are fully open.

Why don't you get the installer back to balance things? They should have checked the new rad before...

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Choosing A Hot Water Heater For A Tiny House – The Tiny Life

Tiny House, Tiny Living, The Tiny Life.

Recently I have been spending a lot of time trying to figure out the best option for hot water heaters for my Tiny House, but I have been back and forth on which way to go. So I realized, why don’t I see what my readers might know!

So far I have decided to focus on tankless hot water heaters. Essentially these hot water heaters don’t hold water like traditional hot water heaters, they rapidly heat the water as it flows through their heat exchangers so you only heat the water you use. The area I am having trouble with is to go with an electric unit or go with a propane unit. I don’t like how much power the electric ones use (13 kw/h) if I one day go solar, but the gas units are a lot bigger (not so great in a tiny house) and need to be vented. I also don’t know how quickly I would burn through a propane tank (I take 10-15 minute showers daily).


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Hands-on Basics
The Home Power and FSEC articles listed below are the best way I have found to get up to speed with building a solar hot water heater. They are very well done, and very hands-on. Solar Site Survey ... Before you embark on any of the solar projects listed below, you MUST do a solar site survey.
This will ensure that you actually get enough sun on your collector to make it worthwhile.
It only takes an hour, its fun, its easy and you will learn something about how the sun moves. Solar Site Survey... Solar Hot Water: A Primer,
Ken Olson for the Arizona Solar Center

This is a basic introduction to solar water heating, and provides a description of different types of systems and their pros and cons. A good place to start.

See the entries below for more details on each type of system, and for systems you can build yourself.
If the number of types of...

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There are two basic types of water heaters: the traditional kind with a storage tank and tankless water heaters, which heat water as needed. Typical costs:With all needed parts and labor, hiring a plumber to install a traditional gas water heater costs $300-$3,500 or more, depending on capacity (with 40 or 50 gallons the most common sizes); length of warranty (typically 5-12 years); and the amount of repairs required to meet current building codes. CostHelper readers report paying an average cost of $948 for a 40 gallon unit (ranging $360-$2,800); an average cost of $1,211 for a 50 gallon unit; and an average cost of $1,937 for a 75 gallon unit (ranging $1,300-$3,588).A tank-style gas water heater can also be purchased at a home improvement store, plumbing supply house or online retailer for $230-$2,000 or more, with installation done separately. Installation costs vary significantly depending on who does the work; the condition of the water heater hook-ups, and if any...
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