Yes sensor should be replaced along with lower element.
1) Manufacturer's say that flooded water heater should be replaced: Call homeowner's insurance company.
http://waterheatertimer.org/Flooded-water-heater.html2) Brand of water heater is not known, but it could be the American or Craftmaster or Whirlpool energy-smart electric with control box.
http://waterheatertimer.org/Whirlpool-Energy-Smart-electric.html3) With energy-smart:
1 flash is start-up failure, and 3 flashes is sensor failure.
The moisture probably shorted element and/or lower sensor.
4) The moisture inside tank will take long time to dry out, especially since the foam insulation is wrapped tight. To dry out element and sensor, you have to remove cover and insulation over element, but if you leave insulation off and run water heater, then the sensor is exposed to cool outside air and will not read temperature inside tank.
Plus a wet water heater is electric shock hazard.
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I reccomend locating the source of the water leak first and then formulating a question based on the presentaion of any available useful info you may have. All you have stated is that your basement is flooded and your water heater is a little wet in one spot presumable near the entry door to the pilot light not the entry door to the basement. I can't be sure which from your lousy description. I'm also curious if the pilot light is an issue at all. Do you know how to light it. Have you lit it before? Assuming the water heater is leaking and flooding the basement that issue would be unrelated to pilot light operation in any case. I would say that if your water heater is leaking, you should not be trying to return it to service until you determine the cause of the leak. Did the unit overheat and release water through the pressure relief valve on top. If so you need to dissasemble the heating and thermostat components and replce them with a simple kit you can buy at Home Depot. Also this time install a PVC pipe on the discharge valves at both the top and bottom of the unit and run those pipes to the nearest floor drain in the basement.Purchase a water heater spill pan as well and place it under the unit. Installa pvc pipe on the pan as well and run it to the nearest floor drain. Next time the basement won't flood when the water heater springs a leak of any kind. Bottom line to fix the problem issimple. Go to Home Depot and get a water heater rebuild kit which comes with new heating elements of similar amp rating to your water heat. It also comes with a new thermostat and pressure release valve. Go home and install the kit. Do not skip any steps in the installation instructions! Then install your new emergeny drain plumbing and make sure to use pvc rated for high temperature. Then hang a dry erase marker on or near the freshly rebuilt unit and write the date and maintenance you performed on the unit. From now on you will perfom an annual maintenance inspection of the unit including draining all sediment out of the tank bottom by opening the tanks drain valve and letting the tank purge out all the sediment that builds up in the tank bottom. You will also remove the heating elements and clean them to ensure efficient operation. Then inspect the drain valve and connecting pipe threads to make sure they appear to be in solid shape and wont break . Write that down on the heater along with the date you inspected it and next year you will have a written reminder there to tell when when it is time for next inspection. Your water heater will never break again and flood your basement if you follow these steps. Good luck.
That sucks about your basement flooding. I recently had a neighbor whose basement flooded, and he had a lot of water damage. Have you considered calling a professional? I imagine they have the skills and tools to help fix any number of things that might have been damaged in flooding. Good luck! http://www.redeemingrestoration.com/wate...
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