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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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Posted on Jan 02, 2017

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I have a bad fan/limit control Honeywell L4064A 2188.What would sbe a suitable replacement part number?


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How do you adjust settings


take cover off and hold round dial so it dosent move. there are 2 tabs in the dial . the one on the left is the low limit. the one on the right is the high limit.high limit is when the furnace shuts down 200. the low limit is when the blower will stop 90 to 100 degrees.

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Here's my best shot.
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The low OFF setting should be about 100 degrees.
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What is a good seting for fan limit


I just did a search-- Here is an excellent, illustrated article on the purpose and settings of this important Fan controls switch- Enjoy!

http://www.inspectapedia.com/heat/FanLimitSwitch.htm

Let me know if you have other questions on the adjustment

Thanks for asking-

Mack B

Jan 26, 2011 | Honeywell L4064B2236 Fan/Limit Control...

1 Answer

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I have a honeywell L4064A limit control i need to know what the setting should on the dial for fan limits bluescorpion_67@msn.com


First thing I would suggest just to be on the safe side before you began shut power off to unit.
Remove cover on combination fan and limit.
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What should the inside dial be set at? there are three positions.


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