Question about Rheem Tankless Hot Water Heater Rtg-74pvp-2 7.4 Gpm

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How do you set the thermostat above 120 degrees? My dishwasher requires 135 degrees. Thank you.

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You shouldn't have to set your heater to 135. dishwashers have a built in heating element for just this purpose.

once you start going over 120 degrees on your water heater, you start creating scalding problems.
130 degree water can cause second degree burns in 30 seconds
140 degree water can cause second degree and even third degree burns in 6 seconds
150 degree water can cause third degree burns in 2 seconds.

be very careful !

Posted on Aug 10, 2010

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Raise temp above 120


Raising temperature above 120 degrees requires service call.
Or change dip switch settings and risk voiding warranty and causing service call expense.
http://waterheatertimer.org/Troubleshoot-Rheem-Tankless-water-heater.html#temperature

Earliest versions of Rheem tankless 2006-8 let you set temperature up to 140 degrees F using remote.
However the hotter setting caused error codes because the burner cannot keep up with both high temperature and large volume of hot water rushing through pipe. Especially in winter with cooler incoming water that must be heated more to reach temperature set point.
The burner simply cannot keep up.
So Rheem changed maximum temperature at remote control to tepid 120 degrees, which is not hot enough for folks wanting hot shower, or folks filling whirlpool tub because water in tub cools before tub fills.

If you need further help, I’m available over the phone at https://www.6ya.com/expert/gene_9f0ef4df2f9897e7

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As a general rule, thermostats are set to 120 for optimal heating/energy-conservation.
If household uses more hot water, then move upper thermostat to 135 for example, and leave lower thermostat at 120.
http://waterheatertimer.org/9-ways-to-save-with-water-heater.html

Add a comment for more free help.
Also take advantage of fixya expert assistance live.
For a price, expert works with you while you work on water heater or any do-it-yourself project.
Fixya is always less expensive than a service call.

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