Question about Eemax "Flow Controlled" Electric Tankless EX65

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Hot water not coming out

Model 640DORS

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Gene Haynes

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Tank-type Electric water heater?
Press reset button.
http://waterheatertimer.org/How-to-troubleshoot-electric-problems-with-water-heater.html

Add comment and describe water heater, and more detail about problem

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Posted on Mar 30, 2013

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Power out for 48 hours, tankless water heater located outside of house, temperature around 20 degrees, no hot water coming out of tap, where do i begin?


First, I don't even want to know why someone would put a tankless outside as you have found out...really bad idea. In order to help you, more information is needed. Is this a gas or electric unit? Or a gas unit with electric controls? Is it mechanically or electronically controlled ( a make and model would help). Are the water lines to or from the tank exposed? When you say no hot water coming from the tap does that mean when you turn on the hot water faucet you just get cold water or no water?

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I just bought irect water heater model HL40Sk ,is heater comes with legs it was nothing in corton ?


It most likely is a wall mounted model. Did it come with instructions? That will show you how to install it.

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Hot water varies


I do not know how old this unit is or what model but many water heaters are not sophisticated enough to measure the temperature, but heat based on water flow and temperature rise. To start, tankless water heaters turn off every time you turn the hot water off. Lets use an example. You use the facilities, wash your hands then turned off the water and take a shower. You will bring the already heated water (from washing your hands) from the pipe up to the shower. Then the cold water that comes into the pipe from the reactivation of the water heater comes up the hot water pipe with warm then hot water just behind.

If this is not your problem, keep reading. Every unit I have been called to see were installed wrong. Check your installation manual to see if the problem with the system started with the contractor.

First, check the temperature of the water from the heater. If it is too hot and you are mixing too much cold water in, the unit will turn off because there is not enough water flow to keep it running.

Second, turn off the valve at the water heater and turn on the hot water at a faucet. If the water does not stop running, there is a "plumbing cross over" usually caused by a failing pressure balance valve in a shower.

Third, if the unit has not been serviced, go to bosch-climate.us to find a tankless water heating professional in your area. Totally Tankless LLC

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Stiebel Eltron 221094


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only warm water coming through. Do I need to replace unit?

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I have a 640dors reliance capacity40 water won't stay hot long(electric)


remove the two covers one high and one low and set the temp higher. This time of year with colder water comming in the house the water heater has to work harder to raise the temp of the incomming water. In the summer the incommong water is much warmer. 40 gal is a small water heater and you will only get about 15 gal of hot water with the ice cold water entering the water heater as you use the hot water. You can get a bigger water heater. even better is to go tankless and a have never ending hot water and save money at the same time.

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1 Answer

Water heater appears to override thermostats. Water gets scalding hot. This has happened twice. First time I replaced both thermostats. Set both at 120degrees. Model 640DORS Sereal# CO5A035030Thank you


1) There is a water heater condition called 'stacking'
http://waterheatertimer.org/Stacking.html

2) Dual element tanks are 240Volt.
Thermostats turn off 1 leg of 240Volt circuit.
If element is shorted to ground through center of element, it might not trip the breaker.
In this case, the bad element would continue heating with 120V through ground wire.
http://waterheatertimer.org/How-to-test-water-heater-element.html

Add a comment for more free help.
Also take advantage of fixya expert assistance live.
For a price, expert works with you while you work on water heater or any do-it-yourself project.
Fixya is always less expensive than a service call.

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My dad lost the manual to his 606 Model # 640DORS. We can't figure out where you change the temp.; the person who installed it several years ago, turned the temp. way down, and in the winter, it doesn't...


Remove access door usually on upper side of unit. Will need to unscrew retaining screws. Under cover is a thermostat that you can adjust to your liking. Reattach cover when done.

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Pilot lights,heater comes on, water gets warm but not hot


Feel water (carefullly) by releasing pressure relief valve slightly, if it's hot there, check your by-pass valve(s) at rear of tank for faulty valve(s) or in wrong positions. If not hot, check thermostat. Please get back with proper model number for better directions for troubleshooting thermostat.

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Our electric water heater doesn't work.


make sure it is wired correctly, check circuit breaker, check breaker built on to element. If all fails, and it is determined your not getting power to it, you may need a electrician. Be careful. good luck.
Steve

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