Sunnybrook hot water electrodes

[tom1948]

I am trying to help a friend who owns a SunnyBrook fiver and he says the electric hot water doesn't work. I pulled both the red and brown wires in the outside panel from what I think are going to the electrodes to test with an ohm meter. He thinks the electrodes are behind the metal box under the sink. I am now thinking that the wires outside are too small in gauge to run a hot water heater. They look like 12v.
Do we need to remove the metal box under the sink? There is an on/off switch on the metal box as well as on the wall.

[tom1948]

Thanks. I will look there.

[Old-Biscuit]

Red and brown wires are 12V DC and go to t-stats

Electric element uses 120V AC power.
Element and wiring are under the cover on backside of tank

The ON/OFF switch on cover needs to be in ON position for electric element to work