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Resetting hi and lo limits on honeywell L7103 h2o heater control

How do Imake the adjustments?Upper limit is158 degrees,should be 145.

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Instruction book says to press the UP, DOWN and I buttons on the circuit board all together for 3 seconds. Then press the I button until the item you want is displayed i.e. the upper limit set point. Then press the DOWN button until you have set the temperature you want. After 60 seconds without any inputs, the temp is set and the system goes back to READ mode.

I just got one and need to set my upper limit from 130 to 140 degrees. Showers are a bit cool.

Hope this helps.

Posted on Apr 05, 2009

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Get a new limit that is 145

Posted on Jan 25, 2009

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