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How to install aquastat relay L8148J1009

I would like to know how to install aquastat relay L8148j1009 step by step pls thnks

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Go to this URL for pdf instruction sheets.
http://customer.honeywell.com/techlit/pdf/PackedLit/95-6940.pdf

Posted on Dec 04, 2009

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2 Answers

My boler will heat the hot water & heating but not the hot water on its own


This is possibly because you have a zone valve that has stopped working, motor maybe burnt out or could be that it is permanently open . Some valves have a manual control that clicks into position, these valves are usually placed adjacent to your hot water cylinder
Hope this helps

Jun 22, 2015 | Heaters

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Boiler Aquastat - How to set it


It is the coldest day of the year and your boiler is chugging along. However you notice that your house is slowly cooling off even though the boiler is running. Then you notice that the boiler is shutting down even though your house is not up to the thermostat temperature setting.

You look into the situation farther and notice that you boiler temperature is below say 180F. What is shutting the boiler off? The device that controls the temperature of your boiler is called an aquastat. This device senses the temperature of the water in your boiler, and then fires the burners to keep the water at the temperature call for by the aquastat.

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The other role that this device may play is to keep the boiler from getting too hot and making steam. However for this time we will concentrate on the lower side and the heat of the water. If you have a house that has barely enough baseboard or radiators for that really cold day then you need your water to be very hot or around 200F. This will give the water enough BTU's to carry around the piping to give off to keep your house warm. The downside is that it also makes your boiler less efficient when it needs to heat the water this hot.

So, now you know that if you need more heat you can turn the aquastat up higher to get more heat and turn it lower on the milder days to save energy. Another way to do this is to buy and install a smart control that will do that automatically for you. These are called an outdoor reset control and will vary your boiler temperature according to the outdoor temperature, saving you money and keeping you warm all at the same time.

Now, the one thing you need to know yet. The aquastat is usually a gray box with a screw driver slot in a little wheel that has numbers on it. It is often hidden pretty well and may take some looking to find it. Some of the newer boilers may have a digital one that is in a bigger gray box. Read the instructions to learn to change the temperatures.

Setting your aquastat correctly can save a lot of money and it can be the difference between keeping you warm or not.

on Dec 08, 2009 | Heaters

1 Answer

How do i wire 2 zone value 4 wire 2 red 2 yellow to a aquastat


Need to know the name of the zone valves, then I can help you. also name and model of the aquastat.

Dec 29, 2010 | Heaters

1 Answer

Solid fuel stove linked to oilsystem with two zone


Put a temperature operated control (aquastat) on the piping of the wood stove so that if it is on, it will interupt the circuit wired to the oil burner at the X&X terminals of the boiler control.As the wood stove cools off, it will close the connection allowing the oil system to fire.

Mar 04, 2010 | Honeywell Electronic Programmable...

1 Answer

My heat is not reaching the temp i set on my thermostat


If your system is a hot air furnace or heat-pump, have you inspected the air filter? If it is a bolier, you may need to increase the aquastat temperature.

Feb 02, 2010 | Heaters

1 Answer

I have oil heat hot water boiler. i set thermostat to 60 and the temp goes to 80 using up alot of oil and very hot in house. any suggestions?


You may have either a bad thermostat, shorted wire to the thermostat, a stuck relay or a bad gas valve. You will need to test the thermostat using a multimeter to make sure it is working correctly. If that is good, start checking the aquastat relay.

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1 Answer

Gas pool heater above ground will lite and feel heat then shuts off


do you have flow through the heater, pump for pool running , is your aquastat[ water temp control] set correctly

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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 | Heaters

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