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Honeywell l4006e high limit aquastat reset button had to be pressed to start boiler limit is on 240 degrees.

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Therinnaiguy
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SOURCE: what is the recomented settings for high and low

180 with a differential of 15 or 20. So 180 high and 160-165 on low.

Posted on Nov 03, 2009

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I have a Honeywell aquastat that was set at 160 on the high and 170 on the low I believe the circulator is locked out how can I manually reset that


Something is backwards here. Typically, HIGH limit should be 180 LOW limit 160 with 10-15 degree differential, depending on boiler size, load, etc. If it is digital and you don't have the instructions go to link below. If its the old dial type you should see 3 dials. one labeled HI, one LOW and one DIFF.

Nov 08, 2017 | Honeywell Heating & Cooling

2 Answers

I have installed honeywell aquastat relay per instruction manual on my dunkirk xeb-4 lp boiler furance with honeywwell ignition unit s8610u but it wont ever start the exhaust fan checked everything several...


If aquastat wirings are ok, and control module had been set up properly, the the furnace should start.
Check if bypassing the control the furnace starts, if it starts then check aquastat wirings.
If it depends on the furnace, check the valve, the safety sensor and the ignitor.
Here is the guide to set up the Aquastat control:
Guide to Setting & Wiring Heating System Boiler Aquastat Controls

Sep 13, 2008 | Honeywell Heating & Cooling

1 Answer

Aquastat pops reset when reaching temp.


Aquastat cycling controls do not have a reset button. What you are looking at is a manual reset limit switch. That is a safety control set at the MAXIMUM allowable temperature for the boiler to attain. More than likely the actual cycling control is not cycling at the correct temperature allowing the overtemp condition. The cycling control will be very close in external appearance to the limit switch but it will not have the red reset button and it is wired in series with the limit control and will turn the boiler off and on automatically based on its setpoint.

Mar 12, 2015 | Heating & Cooling

1 Answer

What would the correct high and lo and diff settings for the Honeywell L8124A Aquastat I have a wood fired boiler with the oil fired boiler side by sides,


I would say high if you need cooling. If the tempature is cool enough for you then set it to low.If you are hot and need more cooling then high.

Apr 05, 2009 | Honeywell Heating & Cooling

1 Answer

I want to adjust the hi and low water temp limits for my oil hot water boiler; I have a Honeywell L7224 aquastat but I cannot find any temperature indicators; how can I do this?


To enter the adjustment mode, press the UP, DOWN, and I buttons simultaneously for three seconds. Press the I button until the feature requiring adjustment is displayed:
• HL —High Limit.
• LL— Low Limit.
• Ldf —Low Limit differential.
Then press the UP and/or DOWN buttons to move the set point to
the desired value. After 60 seconds without any button inputs, the
control will automatically return to the READ mode.

(copied from honeywell's instructions)

to clarify the differential is cut in minus the cut out.
Hope i can be some help to you.

Apr 21, 2008 | Heating & Cooling

4 Answers

Boiler will not shut off


boiler does not shut off when thermostat reaches temp, i already replaced aquastat but condition still exists

Nov 14, 2007 | Heating & Cooling

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