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I REPLACED MY HONEYWELL AQUASTAT THIS PAST MARCH. THE BOILER RUNS OK BUT THE TWO CIRCULATORS DO NOT RUN WITH A CALL FOR HEAT. COULD THE AQUASTAT HAVE GONE BAD ALREADY AND IF SO HOW LONG ARE THEY GUARANTEED FOR?

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5 Suggested Answers

refritech08
  • 149 Answers

SOURCE: I want to adjust the

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.

Posted on Apr 21, 2008

ginko
  • 19396 Answers

SOURCE: I have installed honeywell aquastat

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

Posted on Sep 13, 2008

mohammed387
  • 1952 Answers

SOURCE: I have installed honeywell aquastat

it ll operate only wen it gets fault current in main supply..can u tell how come u know tat it is workin?

Posted on Sep 13, 2008

  • 234 Answers

SOURCE: what would the correct high and lo and diff

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.

Posted on Apr 07, 2009

  • 119 Answers

SOURCE: I had a Honeywell Thermostat

Is this a new hvac system? A new furnace can work differently than your old one. Does it shut off after a minute or two or continue to run? If it continues to run then call that professional back and let him fix it. If it shuts down after a minute or two then it is a feature of the new thermostat to squeeze all of the cool it can from the a/c coil and ductwork.Some of them have settings that you can adjust for blower delay on and off, read the manual that came with the t-stat and see if it does.

Posted on Jun 17, 2011

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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

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Page 12 of the manual begins examples of wiring between the Boilermate and aquastat (also gas valve and multi-zone relay), that is usually mounted on the boiler. In order to use it correctly, you'll need to determine which aquastat (or other device) your furnace has. You should be able to locate this info on the inside of the aquastat cover. The Honeywell Triple Acting aquastat is very common and looks like this:

11_29_2012_7_17_38_pm.jpg
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I suspect that the switch(es) that are connected to the orange (or blue) wires - or the device (aquastat or multi-zone relay box) is not operating as expected to start the furnace.

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