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water heater temperature brain puzzle

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water heater temperature brain puzzle

Old 10-09-2015, 07:25 AM
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Default water heater temperature brain puzzle

Is there any way to find out what temperature each of the two thermostats are controlling temperature at?
First choice is to turn on a hot side tao near the heater and measure the temp ? Right?

But if the upper stat is set lower in temperature than the lower stat , after the heater sets a while after both stats cycle off, ALL the water in the heater will be about at the temperature of the lower thermostat? Right, since heat rises? and thats the temp you will measure?

But if the upper stat is set higher than the lower stat, thats (upper stat setting the temperature you will read coming out of the tap on the first draw since first draw water comes off the top?.

you could disconnect one element at a time , wait, then see what the temperature is after it all equalizes but who wants to do that.

any idees?
Old 10-09-2015, 07:37 AM
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Only one element is on at a time. I think upper tstat clicks, that turns off top element then energizes the lower tstat and element. Something like that.
Old 10-09-2015, 07:44 AM
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If you have the right equipment (which you probably don't) you could pull the thermostats and verify the settings. But the rule of thumb is since the two are interlocked (only one on at a time) setting both of them to the same temperature is the correct choice. The upper thermostat keeps the water leaving the tank at the correct setting and the lower one heats the incoming cold water.

This information will be available on the OEM's web-site.
Old 10-09-2015, 08:05 AM
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Originally Posted by Corndog38 View Post
Only one element is on at a time. I think upper tstat clicks, that turns off top element then energizes the lower tstat and element. Something like that.
This!

The water enters the heater at the bottom through a plastic "dip tube" inserted into the inlet fitting, unless some bonehead plumber heated the inlet fitting and melted the dip tube, causing it to fall into the tank.
Old 10-09-2015, 01:04 PM
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true but the oems also say the stats can be off 20 degrees.

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