Water Heater Thermostat
If your looking for water heater thermostat information you can find it all here. How to test or replace a thermostat. How to check the limit switch, adjust the temperature, buyers guide and more.
Test a thermostat
Replace a thermostat
Water heater reset button
Water heater temperature
your water heater be.
How to use a multimeter
The thermostats in this pic are for a duel element 240 volt storage water heater.
The thermostat on the left is the upper or primary thermostat.
The thermostat on the right is the lower or secondary thermostat.
The upper thermostat is mounted onto
a limit switch.
This limit switch (top of pic) has a red reset button
As you can see this thermostat is
When the thermostat is satisfied power is then sent to the upper right terminal and is transferred to the lower thermostat.
This is the lower thermostat.
If the thermostat calls for heat power will be transferred to the bottom terminal which will energize the lower element.
The thermostat on the right is designed for a single element water heater.
The thermostat on the left is designed for a duel element water heater.
As you can see the single element
thermostat only has two terminals.
If your shopping for a water heater thermostat the two things you'll
If the label is missing from your water heater you can find the
The upper thermostat and limit switch are always sold together.
There are several brands of residential tank type electric water heaters. You do not have to buy a brand specify thermostat.
If you must replace a thermostat its always a good idea to replace both thermostats at the same time.
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