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Very hot water then it kicks off and I have to frequently reset

Out of no where I started getting extremely hot water causing the unit to shut off and I have to set the reset button frequently
Turning down the temp to "hot" only does nothing

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Even though the water is very hot do you run out quickly? If so the problem is the 'dip tube' if not it is most likely the upper thermostat.

Posted on May 07, 2010


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Hot water heater keeps shutting off.

This sounds like a circuit board has a component that may be heating up and failing. When the unit is unplugged power is shut off to the circuit board, which will allow the component to cool down and start to work again. If this is the case then the component will fail completely at some time.

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Water heater is kicking switch in upper unit

typically when the upper braker pops in an electric water heater, it is an indication that the upper element has been breached, allowing water into it and shorting out the unit. the breaker prevents electrical disaster.

turn off the power to the unit via the breaker box, remove one power lead from the upper element, and with a multimeter, make a resistance check. Should read somewhere close to 14 ohms. If you get a significantly higher reading or significantly lower reading, the element is bad and needs to be replaced.

To replace the element you will need a socket wrench that fits the element. prepare your replacement assembly by seating the seal to the base of the element. Ensure the power is off, remove the second wire from the element, shut off the water supply valve, check that the pressure is off by turning on a hot water faucet near the unit and shut it off when the water stops running.

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Rinnai RL94i - Produces hot water for 3 minutes, then stops

I just had this exact problem. It kept getting worse until we had no water. Our Rinnai tankless hot water heater started the same way though, with hot water for a few minutes and then would shut off with an error code 10. We just had to shut the hot water off and then back on, wait a minute or so and we had hot water back for a few minutes. Our unit would come on with a loud vibrating noise and remain until it shut off with an error code 10 (air flow fault). The solution was to remove the blower fan and blow out the squirrel cage. Ours had moths in it. We also vacuumed out the fan housing. Be careful to mark any wires you disconnect and take pictures before removal. Our unit is now almost silent when it comes on and supplies endless hot water.

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Reliance 606 electric 40 gallon hot water heater will get extremely hot and then shut off. I have to push the reset button after showers. I have turned the heat down but it still gets to hot. Thermostat...

ECO reset button trips for several reasons.

1) Easiest thing without testing, is replace both thermostats.

2) If problem persists, then test elements.

3) If problem continues, do full troubleshoot

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1 Answer

Kicks off on high side temperature

one of the thermostats has gone bad and it causes the reset to kick...
Check out this tip and also the other links to tips at the bottom of this one...

Electric Hot Water Heater Temperature Adjustment



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I have a problem with my Rinnai hot water heater giving me intermitant hot and cold. The water gets hot and I get in the shower. A few minutes later the hot water stops and I have to shut of the hot water...

We had the same problem - the hot water would only be hot for 3 -5 minutes and shut off, then we had to turn the water off, wait a few minutes, and do it again. VERY FRUSTRATING.

Solution: The Rinnai serviceman showed me the heat-exchanger blower/fan: It was clogged with dust and moths.

Another clue: Our Rinnai was extremely noisy when the heat came on. After the fan was cleaned and replaced, it is nearly silent.

If you are reasonably mechanically inclined:

The blower-fan is located in the lower central area of the unit (at least on our unit). If you draw imaginary north-south, east-west lines through the center of the unit, the fan is in the lower-left quadrant. There is a spring clamp securing the black rubber accordian-like tube to the fan. There are two screws that secure the fan to the unit. there are two plugs that connect to the fan, as well as a third air-flow sensor that should be removed. then you can look at the fan unit, as well as the grill on the underside of the heat-exchanger that should be cleaned.

My thought was to go out and get a simple bug-screen, and place it over the air-input outlet vent going outside, but the repair guy said that although it may sound good, if that screen ever gets clogged, or reduces airflow to the Rinnai, then the unit will work harder, or even shut off, giving the same problem.

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Push the reset butom and there's hot water, but about a minute later, hot water stops flowing. If I want hot water, I have to reset it over and over again.

Too many possibilities to solve without being there. If you have to reset it, that means that one of the many safety switches kicked in. Be careful that you don't make it a habit of resetting it without getting it checked, doing so will mostly likely cause a lot more problems.

Mar 18, 2010 | Stiebel Eltron 3-2 Tankless Electric Water...

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Code 11 01 - Hot Water Heater Kicks Off

if you have build up in the heat exchanger it will cause the unit to use more gas to heat your water, if the gas line isn't sized properly then your going to kick the error codes off. it sounds like you have two problems, first you have build up in your heat exchanger and it needs to be flushed and second you need to get a bigger gas line to it

Aug 19, 2009 | Water Heaters

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