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Originally Posted by Lucky1
Water heater turned off when not there and pump turned off too. The circuit breaker box has room to pencil in the ones to turn off different areas.
Does anyone know how I find out where to turn off the hot water without such a marking? I have a handle to the house here that shuts off the water but do not see anything that tells me what circuit is the hot water heater in this house? How would I find that?
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Originally Posted by Steveo
Two ways - first tanks usually make a low humming sound when heating (need to have your ear to it). Run your hot water until you hear heater turn on. Then cycle through your breakers until you hear it stop. Breakers could be single or double (120 vs 240) and more than likely be 30 amps. The second way is to carefully remove the plate that the power supply wire goes into your tank. Hook up simple power tester light (couple bucks at hardware store). Then cycle through breakers until light goes out.
Good luck
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Rather than opening up the panel on your heater to get at the connections, go to Sears (or perhaps your local hardware store or Lowes or Home Depot or ?) and get an AC voltage detector for about $15. These devices detect the presence of the AC line voltage without having to make physical or electrical contact and beep/buzz to alert you. Hold the tip one near the heaters input AC line and hear it beep. Turn off the breakers one by one, checking between each switching to see if the alert remains or not. When you don't hear the alert, the last breaker opened was/is the heater breaker. Turn that breaker back on and make sure the detector beeps again. You've found your breaker, label it. It'll usually be a dual breaker BTW.
Link to Sears Tester
