Question about Stiebel Eltron DHC 6-2

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The problem is that the thermal reset switch shut off after the water faucet is shut down. The water heater works but have to be reset every time that I want hot water. The problem is the thermostat or the thermal safety swith?

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Posted on Jan 02, 2017

  • 409 Answers

SOURCE: water heater not working after turning up heat

Did you turn the breaker completely off, then back on? When a breaker trips it is in a middle position, and nust be turned off to reset it, then it can be turned back on.

Posted on Mar 17, 2010

SOURCE: The water heater "Stiebel Eltron

I am a free answerer, and I specialize in giving you resources for free
The paid answerers may have a person who knows your product and the problems associated with your model.
I believe they offer a refund if the 'fix' doesn't work.
The manual might also have troubleshooting.

Each day I see 20-25 unanswered questions about tankless water heaters.
And the day before, there were same number of unanswered questions about tankless products.
The number of questions shows the complexity of the machines, the brand-specific-ness of the problems, and the inability of the manufactures to take care of their customers.
If I understand correctly, the manufacturer will refer you to the installer.
There are not many ways a do-it-yourself-er can fix a tankless.

http://www.thetankatwaterheaterrescue.com/forums/forum3/

Posted on Oct 31, 2010

  • 8404 Answers

SOURCE: the safety thermal cut off

There is a short somewhere ... You will have to get the fault fixed so the safety will stay engaged.

Probably not what you wanted to hear.

Posted on Apr 05, 2011

  • 6 Answers

SOURCE: No hot water in our tankless water heater

Take off front cover, on the top of the two cylinders in there (the heating system) there will be a small red button. That is the Safety Thermal Cut out, depress that red button. It is similar to a circuit breaker. If the red LED comes on when you turn on hot water at a sink then that was the problem. I have on that trips periodically. Its annoying but not enough to replace the part yet. Good luck.

Posted on Dec 06, 2011

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1 Answer

Keeps tripping thermal shutdown


Most of the time its just bad (thermo disk) thermal shutdown as you call it. If you dont have any hot water at all just unplug the two wires on that disck and stick them together,this bypass that disk. then have somebody turn on the hot water while you watch the heater for any problems. Let me back up just a little.
Before you do that you must know if its tripping while the water is flowing through the heater if it is then its a weak disk. If it trips a few seconds after the water is shut off then for some reason(usually a bad circuit board) the element is not shutting off and over heating the disk. That means the disk is doing its intended job. Do not bypass the disk ifit trips after the hot water is shut off at a faucet.

Jan 11, 2013 | Stiebel Eltron TEMPRA 12 Tankless Water...

1 Answer

Bosch AE-9.5 keeps tripping the reset


All resets and breakers trip with high heat.
Do you mean the tankless unit is tripping the 40 amp circuit breaker?
Or the thermal cut-out, located on unit, is tripping?

Is this a new installation?
Or was the tankless working before and stop working?

Copy following link to check wiring.
AE 9.5 requires 40 amp breaker and 6 gauge wire.
http://waterheatertimer.org/How-to-wire-Tankless-electric-water-heater.html

If the unit is tripping the thermal cut, -out, then product manual says to call Bosch or service technician.
Call Bosch 866-330-2729
http://waterheatertimer.org/pdf/Bosch-Powerstar-AE3.4-7.2-9.5.pdf
Thermal cut-out can trip if water flow is too low.
Try changing power selector screw from Hi to Lo so only 1 element is ON. See diagram page 6 of manual.
Adjust the 'outlet service valve:' The manual recommends that a ball valve be installed between hot outlet and faucet. Adjust the valve so more water flows to faucet.
Remove aerator, clean aerator, don't use low flow restrictions or low flow shower heads, replace leaky faucet cartridge on single-handle faucet.

Aug 29, 2012 | Bosch AE-9.5 PowerStar 1.5 GPM...

1 Answer

I have a leak coming from the "cold" line right at the valve joint. There is signifigant calcuim build up on the pipe from the valve to the connection of the water heater, (maybe 8 inch of pipe)...


Very simple - call a Plumber. He will fix your plumbing problem, and any foreseen potential problems related to your water leak. He may also suggest replacing your 6 year old water heater. Of course ..... for a professional cost.
However, depending on your time, skills, proper tools, patience and luck, it's easy enough to perform yourself:
1. Switch off the water heater Breakers (220v) in your service panel.
2. Turn off the water supply to the water heater.
3. Attach a water hose to the drain faucet. ( a good time to flush sediment -calcium deposits)
4. Open a hot water faucet to vent (above the level of the water heater drain - kitchen sink)
5. Remove the suspected leak components. (a union connection is a good place to start)
6. Install New pipes -3 wrap all male threaded ends with teflon Tap. Tighten securely - using 2 wrenches.
NOTE: Before refilling - you can turn on the water heater supply valve for a few minutes, to flush out any lingering calcium debris.
7. Shut off drain valve - remove hose. Shut off venting hot water faucet.
8. Turn on water supply valve to fill water heater.
9. Open a hot water faucet to relieve air pressure while filling - preferably the bath tub faucet, it doesn't have a screen that might clog.
10. When water flows without air - shut off tub faucet.
11. Look for leaks.
12. Switch the water heater Breakers on.
Note: 50 gallons should take an hour or more to heat up. Turn on a hot water valve momentarily within this heat up time to relieve thermal expansion. ( the PT valve on your water heater will perform this task if pressures/temperature exceed new water heater tolerances - it's just a precaution to introduce these fluctuating pressures on your fragile 6 year old unit)

These are just basic instructions - assuming you fill in the common sense and work safe steps.
Good Luck - The Skill will only come after trying.

Mar 05, 2011 | Rheem 50 GAL ELEC TALL Water Heater 6YR SC...

1 Answer

Turned off the hot water to fix a leaking tap. now the tap has no hot or cold water and the hot water tank valve is leaking?


It sounds like two problems.
Problem 1) Clog inside faucet or clog inside pipes at faucet
Remove supply tubes leading to faucet and see if problem is inside pipes or inside faucet.
My bet is clog inside faucet.

If you have galvanized pipe that meets copper pipe, this can be trouble spot.
Article on clogged water pipes at Inspectapedia:
http://www.inspectapedia.com/water/Water_Pipe_Clog_Repair_Guide.htm

Article on clogged pipes:
http://www.waterheaterrescue.com/pages/WHRpages/English/Troubleshooting/Tanklets/backflushing.html

Problem 2) Water heater leak ... you say tank valve is leaking? Is that cold-water shut-off valve? Or tank drain valve? Or TP valve?

If cold water shut-off is leaking, then replace shut off.

If tank drain valve is leaking, then check if plastic valve is cracked. If drain valve is cracked, then replace with a brass valve from Home Depot. If plastic valve breaks off, then use hammer and screwdriver to gently chip out the broken plastic valve. New valve threads need teflon tape to seal pipe. If valve is just dripping, then put garden-hose cap over end of valve and screw down tight.

If TP valve is leaking, then replace with same temperature and pressure rating.
New TP valve threads need teflon tape to seal pipe.

Problem 3) If pressure is low all over house:
Buy pressure gauge at hardware store that screws onto hose connection.

Test pressure on outdoor spigot.
Open faucet and check if pressure drops. This says if problem is inside pipes that enter house.

Test pressure on water heater drain valve.
This says if pressure problem is before -or- after water heater.

If problem is before the water heater, then shut-off valve located on cold water line is suspect.
If problem is after water heater, it could be in hot water outflow pipe on top of water heater, or a nearby elbow.

Remove hot water line leading from water heater and check pressure. This says if problem is where hot water leaves tank.
Read articles above about clogs inside water lines.


Nov 16, 2010 | Rheem Water Heater Pressure Relief Valve

1 Answer

Main remote control is not working can you bypass the remote temporarily


No. However you may be able reset the thermostat to its factory setting.
Turn the thermostat off.
Shut of the gas and water supply to the unit.
Unplug or disconnect the unit from its electrical power source. Disconnect the thermostat from the heater.
Wait approximately 5 to minutes, and then reattach the thermostat wires to the heater.
Turn the water supply on and open the tub faucet to its hottest setting for about a minute.
Turn the faucet off and make sure no water water is flowing anywhere in the house.
Turn the gas supply back on.
Reconnect the thermostat wires to the heater.
Connect or turn the power supply back on.
Wait at least 2 minutes before turning the thermostat power button back on.
After the thermostat power button has be pressed, wait an additional 2 minutes before running water.
Test the heater at this time. Turn the water on at the farthest faucet to its hottest setting. measure the temperature with a cooking thermometer.
If you need to make adjustments to the water temperature, either up down, shut all the faucets off first.
The thermostat should read 100 degrees Fahrenheit when it first starts.
If you are receiving an error massage, consult with the manufacturer.
If the thermostat is reading the correct water temperature but the unit is not operating, there are other issue need to deal with. Let us know if this works or you need further assistance.


Sep 26, 2010 | Rheem Tankless Water Heater Main Remote...

1 Answer

The unit starts for a few sec then shuts down.ptg 74.


A couple of things could be happening.

1. There needs to be more water flow at the faucet, a minimum of .75 gallons per minute. Low flow and pressure balance faucets and aerators will not work well with tank-less water heaters. You need all the flow you can get.

2. The flame sensor in the main control unit is week, this is a common issue with your water heater.

Clean the unit to establish adequate water flow. Remove all faucet aerators and turn the faucets on to activate the unit. If you still get the on and off problem you need to call the company for a new flame sensor and/or control valve.

Sep 02, 2010 | Rheem Paloma Tankless Water Heaters...

1 Answer

My reliance electric hot water heater keeps shutting down. when I push the reset button it goes on and works for anywhere from 1 day to 5 weeks. Where do I look for a solution.


According to Reliance's trouble shooting guide, you may have faulty upper thermostat that is overheating, which is causing the high temp limit switch to open and shut it down. Pushing the reset switch is only a temporary solution until you find out what is causing it to shut down. Is it still under warranty? Call Reliance and find out. 1-800-365-4054

May 17, 2010 | Reliance WATER HEATER CO #9-40-DKRT 40GAL...

1 Answer

Hi, is not working, the machin is turn on but we don't have hot water


Possible causes and solutions:
  1. Safety Thermal Cut-Out Tripped, Reset.
  2. Not enough flow rate to activate unit, clean filter screen at unit, clean aerator at faucet.
I hope this has helped. Please rate the answer as to it's helpfulness. Good Luck and have a great weekend. Jeff

Apr 04, 2010 | RTO American Heat Tankless Electric Water...

2 Answers

My Lian tankless electric water heater has shut


there could be a ground fault recepticle between panel and unit.[might be tripped] or there mustbe reset on unit. no led on unit usually means no power.

Dec 02, 2009 | Water Heaters

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