Question about Water Heaters
I can keep reseting the controller and it may be ok for a day or a few days. But then it eventually plays up again. If it is left with out resetting there is not much hot water.
Test lower element.
Replace lower element using generic element from hardware store, and clean sediment out of tank.
Replace element with lower density or with lower wattage such as 3500 watt
Read troubleshoot guide
Posted on Nov 30, 2012
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Posted on Jan 02, 2017
SOURCE: no hot water
If the water does not heat, then you have to troubleshoot to find the problem. With a voltmeter determine if 240VAC is actually getting to the water heater. Take care here - a defective circuit breaker can give a false 240 volt reading - check for the 240 volts across the upper element (i.e. when the 240 volts has a live load on it, not just an open circuit test).
Also, remember, the upper element has priority over the lower element, and if the water is cold, the upper element will try to turn on and this locks out the lower element (only one element is allowed to heat at any given time). The lower element comes on ONLY after the upper thermostat is satisfied. Therefore if the upper heating element is burned out you will never get any hot water. If you suspect this, TURN OFF THE POWER TO THE HEATER and take a resistance check of the upper element.
Posted on Nov 17, 2008
It sounds like you have a copper canister unit. Ohm out the elements in that one canister. the directions are on the websight for bosch, or I can walk you through it. But you will need a digital multimeter to do this. If you have a blown element in that one canister, then the tco will not reset.
Posted on Jan 19, 2009
Sounds like you have a faulty thermostat. This is the unit that detects the water temperature, and if it is not where it is set, will kick the switch to allow electricity to flow to the elements you replaced. The thermostats are relatively cheap and if you have the knowledge to change the elements, changing these thermostats should not be a problem.
Posted on Mar 07, 2009
If you have to push the reset button it suggests that the boiler/water heater is over heating.What boiler is installed?
Posted on Apr 14, 2009
replace the thermostats, be very careful!!!! thats 220volts for elec water heaters, 220volts kills you if you touch it wrong,.....it is one thermostat but it's best to match them, so you'll need both,...not expensive. good luck, cracklin joe
Posted on Jan 08, 2010
Testimonial: "Thank you. Replacing both thermostats solved the problem. The heater is working well."
Tips for a great answer:
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Mar 06, 2011 | Stiebel Eltron Tempra 24 Electric Hot...
Most electric hot water heaters have two thermostats, one near the top of the tank and one near the bottom, and are covered by removable metal cover plates. The thermostats are pressed firmly against the bare metal wall of the hot water heaters tank.
The top thermostat usually has a high limit switch that will trip if the water gets too hot. When it trips it shuts off the electricity to both the upper and lower heating elements.
To reset the high limit switch there is usually a red button that you must press. When the upper limit switch trips it is often an indication that something else has gone wrong with the heater.
When the top of the tank is hot the upper thermostat removes power from the upper heating element and transfers the power to the lower thermostat and heating element. If the lower thermostat is defective, then the lower portion of the tank will not be heated and the supply will be greatly reduced.
Check for power at the upper thermostat terminals where the power is sent to the lower thermostat and heating element. If there is no power then the upper thermostat should be replaced. If there is power then check for power at the lower heating element. If there is no power at the lower heating element then replace the lower thermostat.
If there is power to the lower heating element then it should be getting hot. If it is not, replace it. Another possibility is a broken dip tube. Check for a broken dip tube and replace if necessary.
Hope this helps out
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