Question about Water Heaters
Hi have a nobo N4EU wall panel heater. the fuse is okay, and the timer is okay, but the red light won't come on, even when i turn the thermostat dial up to full. it used to be just the one in the bedroom which intermittently refused to work; now the one in the living room does the same. completely resetting the timer using the reset button doesn't help. can you help?
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Posted on Jan 02, 2017
The top button is connected to the top heater element which is likely shorting out. Drain the tank below the element that the thermostat is attached to. Remove and replace the element
Posted on Jan 24, 2009
it usaly takes a few hours to heat up depending on water size check our breaker to see if it tripped out make sure all your wire connections are good u could take the front plate off and hit reset if you dont get hot water in a few hours ull probibly have to replace the trermostats and maby the elements its not hard to do good luck
Posted on Mar 07, 2009
Air in system. Make sure there is no sources of ignition and loosen the supply line at the heater and purge all air. Mske sure your source valve is open. then turn off yje heater after tightening the line. Let sit in off position for 15 minutes. Then turn therm knob to on slowly and then over to pilot, depress pilot button and hold a ffew seconds. Pilot should light. If so, hold for a few and then release and turn ti on position. Good Luck.
Posted on Jun 15, 2009
You can open the top up again. I would not turn the temp higher than 130 degrees, maximum. However, there should be above the thermostat a red button. This is where the power wires connect to the thermostats and heating elements. Sometimes this button needs to be reset, press it and discern if you hear a click sound. This means that the high temperature safety switch has tripped open and you had to manually "reset" it. There are two thermostats by the way. The water heater usually works this way. There are two thermostats and two heaters. The upper tank heater turns on first and it heats the top half of the tank. Then when the thermostat above is satisfied it then allows the bottom heater to come on and heat the bottom half of the tank. You might want to set the bottom heater thermostat as well. This is made this way because it is actually faster and more efficient to heat the top half first and the bottom half secondly. Try this first with the reset button. We could check voltages, but that requires a level of knowledge and safety that I am not sure that you are comfortable with. Pictures of the upper and lower thermostats and connections will help if the "reset" does not do the trick. By the way, not meaning or implying anything, but did you move the thermostat in the right direction? Sometimes the dials can be confusing.
Posted on Nov 28, 2010
ECO reset button trips when thermostat senses high heat event over 150 degrees F, or when upper or lower thermostat is defective. There are other causes: if tank access covers and insulation are missing, and when element is shorted to ground in center of element so that element continues heating through one leg of 240V circuit after thermostat turns off.
Ordinary tank-type electric water heater is fully repairable by homeowner using generic parts from hardware store or home center.
1) Replace upper and lower thermostat for about $28, and if problem persists, then do troubleshoot shown in step 2 below.
2) Take 30 minutes and troubleshoot before replacing any parts.
Troubleshoot requires cheap multimeter from home center.
Install battery in multimeter.
When testing voltage, rotate multimeter dial to 240 or 250 or 277 VAC.
When testing continuity or elements, rotate multimeter dial to ohms (upside down horseshoe symbol is ohms)
Posted on Jan 13, 2011
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