Master plumber my 40 gallon water heater:water gets too hot and trips button on thermostat and leaks water

SOURCE: no hot water

You may need a circulating pump but I can't explain why it was fine before and not now. What I would do is turn the supply off to the water heater along with the power, remove the outlet supply. Open all hot side faucets in the home, using compressed air blow through the pipes if the air comes back at you, then there is a blockage before the hot manifold. If air moves, shut one faucet off at a time to try and determine where the culprit is. I don't know what else to tell you other than that. If air moves through the faucet every time, then you may want to put a circulating pump on. The only other expination is that when they repaired the pipe, some debris or eccess solder is blocking the hot supply. I have seen rocks in units as well. Because of the fix, you may want to take apart each faucet in the house and using a flashlight, look in the hot supply side to see if you can find any debris in those as well. Its not unusual after a repair, to have debris caught in them. Hopefull this helps.

SOURCE: 2007 hot water heater leaking

You will be happier if you replace it
Repairs seldom last very long with this type of problem

SOURCE: Reliance 606 electric 40 gallon hot water heater

ECO reset button trips for several reasons.

1) Easiest thing without testing, is replace both thermostats.
http://waterheatertimer.org/How-to-replace-thermostat-on-electric-water-heater.html

2) If problem persists, then test elements.
http://waterheatertimer.org/How-to-test-water-heater-element.html

3) If problem continues, do full troubleshoot
http://waterheatertimer.org/How-to-troubleshoot-electric-problems-with-water-heater.html

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SOURCE: reliant 40 gallon tall electric water heater replaced both thermostats upper and lower elements flushed tank hot water very hot temp turned down lowest possible keeps tripping reset button what else c

Problem has to be bad element or bad thermostat.

Test elements for short to ground through metal tank wall:
http://waterheatertimer.org/How-to-test-water-heater-element.html

Make sure factory-installed insulation and cover are re-installed over new thermostats so they do not misread tank temperature.
If problem does not show with elements, then replace thermostats again.

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SOURCE: BRADFORD WHITE 40 GALLON ELECTRIC WATER HEATER MODEL M240S6DS-1NCWW.. PROBLEM : I WAS ONLY GETTING A FEW GALLONS OF HOT WATER FROM HEATER. FIGURED ONLY TOP ELEMENT WAS HEATING SO BOUGHT TUNE UP KIT AT

Doesn't sound like its the dip tube, its a element problem, I would contact bw directly to see if heater is stil in warranty and they will send you new parts free.