Electric Water Heater Timer

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Molo

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I have a timer that the electric water heater wiring runs through. It is so that I can take advantage of off-peak rates. I am a bit confused because if I use hot water the tank still turns on, when it is supposed to be off. It is a gray-box timer. Why is the heater turning on? I have adjusted the knobs so that it comes on between 1AM and 7AM

TIA,
Molo
 

Alectrician

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It's just a mechanical timer so you should be able to rotate the dial and clearly see/feel the it switching on/off.

Is the time of day set correctly? Is is wired correctly? Are the time pins tight? Have you been drinking?

The contacts COULD be welded shut due to a previous fault. You should be able to see them. Turn the poewr off and take off the plastic cover and have a look.
 

Cass

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There is a by pass switch on the bottom of some of them that will leave it on all the time or have the timer work.

Or like BrianJohn said it may be broken the chaance of it being wired wrong is slight but possible.
 

Bob NH

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Some of those lower-rate timer systems allow the upper element to heat at any time but allow the lower unit to operate only during the off-peak hours.
 

KD

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How do you know that the WH is turning on? Are you testing for current at the terminals? I assume you know that there will be some residual hot water in the tank when the power is shut off. I have an Intermatic timer and it turns off all power to top and bottom elements. In our area, off peak power is 1/3 the cost of peak power.
 

Patti Slane

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MOLO -are you still there? U have same hot water heater timer i do, same issue, help?

Did you ever get your answer? I have same timer and it does things i don't want (turns fans on in rooms i don't use, run out of hot water when i don't want to, etc.) think it's a great thing but don't know how to set it for my needs. thanks Molo
 

hj

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That timer is like a Model T, there is NOTHING complicated about it and if it is wired correctly it is almost impossible for it to NOT work properly. Your diagnosis may be incorrect, especially since we do NOT know how you are determining that the heater is "still working". IF the lower element only operates during off peak hours, then that is a function of the power company, and they have a separate meter for the lower elements. The heater should also be special ordered so it can be wired for "simultaneous" operation, since the lower element is a completely separate system.
 
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Gary Swart

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Seems to me that unless you are truly knowledgeable and have the proper test equipment (and know how to use it) you would be very foolish to mess with electrical devices of any kind. Screw up plumbing and you may have a leak, backed up drain, or other non fatal problems, but screw up electricity, and you and your family can end up dead.
 

Patti Slane

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Model T or 1913 Maxwell?

The only complicated thing is the instructions written inside the timer are too small for this young lady to read. I am having no other problems with anything other than how the previous owner set the timer to save energy. Thank you for the information that the power company has control over off peak use. My father has a 1913 Maxwell, much better and rarer than the Model T - he took it apart to the frame and reassembled to original! We're pretty savvy.

That timer is like a Model T, there is NOTHING complicated about it and if it is wired correctly it is almost impossible for it to NOT work properly. Your diagnosis may be incorrect, especially since we do NOT know how you are determining that the heater is "still working". IF the lower element only operates during off peak hours, then that is a function of the power company, and they have a separate meter for the lower elements. The heater should also be special ordered so it can be wired for "simultaneous" operation, since the lower element is a completely separate system.
 
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Patti Slane

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Thanks for the warning Gary - I highly respect electricity! All's well - just need to set the timer and contact my power company for off peak usage.
 
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