How do I test my Honeywell aquastat?
How to Conduct Basic Boiler Aquastat Controller Tests:
- Turn thermostat down – Turn the wall thermostat all the way down so it is not calling for heat.
- Check incoming voltage –
- Check the low voltage transformer output:
- Check thermostat switch terminals:
- Check burner power terminals:
- Check circulator terminals:
How much is a Honeywell aquastat?
$114.10 each
Qty | Arrives |
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597 | Wed, Apr 13 |
What is the difference between aquastat and thermostat?

An aquastat does the same thing as a thermostat. But an aquastat senses and controls water temperature, whereas a thermostat does air. In hydronic heating we use both – the aquastat to control boiler water temperature, and the thermostat to control room temperature.
Is an aquastat normally open or closed?
005-213 Clip On Fan Aquastat Normally Open Closes at 110 Degrees F.
What is a aquastat Honeywell?
OVERVIEW. Aquastat® controllers are immersion type devices for limiting or regulating the temperature of liquids in boilers, storage tanks, and other applications where temperature control is required. Honeywell’s L4006 are used in applications that utilize the existing wells.

What temperature should I set my aquastat?
In most cases, the high-limit temperature setting on an aquastat should be between 180 and 200 degrees Fahrenheit. If the aquastat is set at 200 degrees Fahrenheit as the high-limit setting and the pressure valve begins to leak, set the temperature back to 195 degrees Fahrenheit.
How do I reset my Honeywell aquastat?
When the temperature of the controlled medium drops to the high limit setting minus differential, push the manual reset button and the system should be operative again. Reset control to proper high limit setting.
How do I reset my Honeywell boiler control?
Resetting a Honeywell Thermostat
- Power off the thermostat and remove the batteries.
- Put the batteries in the wrong way, with negative to positive and positive to negative.
- Wait ten seconds and put them back in the correct way.
- Your thermostat will be reset to factory settings.
What is a Honeywell aquastat?
Honeywell Aquastat Controller is an immersion type device for limiting or regulating the temperature of liquids in boilers, storage tanks, and other applications where temperature control is required.
How much does it cost to replace an aquastat?
replace a boiler Aquastat relay – $ 700. replace inducer blower motor – starts @ $ 600. Replace contact Relay -start @ $400. Replace thermal coupling – start @ $250.
What is an aquastat controller?
Strap-On Aquastat Controllers from Honeywell regulate the temperature of liquids in boilers, storage tanks, and more. These completely enclosed snap-acting switches operate on temperature rise to set point and are designed for circulator, low-limit, high-limit or unit heat control.
How do I get replacement parts for my Honeywell aquastat controller?
Call 1-888-757-4774 or Need replacement parts for this unit? Strap-On Aquastat Controllers from Honeywell regulate the temperature of liquids in boilers, storage tanks, and more. These completely enclosed snap-acting switches operate on temperature rise to set point and are designed for circulator, low-limit, high-limit or unit heat control.
What is the l6008a used for in hydronic system?
Wiring-L6008A used to control cooling equipment and indicating light. Wiring-Typical oil-fired hydronic system with domestic hot water. Dimension-Approximate installation dimensions in in. (mm) for surface mount models.
Does this aquastat have an extended capillary?
This aquastat does not have an extended capillary, but it does include a bracket for strap-on mounting. The capillary sensor itself is about 3 inches long, as shown in the photo. The tube between the sensor and the unit is only long enough to reach the sensor bulb which is within the back of the unit.