Question about Honeywell Electronic Programmable Heat/Cool Thermostat - CT3300A100 Heater

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My boiler keeps firing up even when the Honey well programmer is in the off position. The programmer is about 7 years old.Do I need a new one, a new battery for it or is it to do with the boiler (oil) itself? Gail

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I had the same problem. I traced it to the micro switch in the water/central heating motorised valve having shorted out.

I replaced the (Honeywell) motorised valve and it is now only running when it should.

Jo

Posted on Apr 23, 2009

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Does anyone know how to use a chattanette coal stove? I think it might have a boiler behind it somewhere. It's part of a U.K. house that is several hundred years old. It has a main "coal"...


A true Chattanette would have been made in Bonnybridge, Scotland, but the principals would be similar. There is a lever above the fireplace that switches the 'draw' of the fire through the back rather than straight up the chimney, if the back boiler is hooked up to a tank properly, this will heat a full tank in about an hour. To the left of the fire grate, there should be a 3 position 'switch' or lever, this should regulate the heat to pass through a vent on the side of the fireplace to pull hot air under the ovens too. If the back boiler is running, the ovens won't get much heat, so if not in use, block the back vent off. Mine gets up to about 200F and the lever is broken, so if yours is ok you should get a pretty hot oven in no time?

Dec 03, 2010 | Stoves Heaters

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The extra benefit of a Modulating Boiler


You're looking to install a new hot water boiler or replace your existing boiler. You come across something called a "modulating" boiler. You wonder what on earth that means. I will attempt to explain some of the features of a modulating boiler.

How nice would it be if you could have your boiler make just enough heat to keep your house warm and nothing more? Your thermostat tells your boiler that you need heat in the house. The boiler starts up and heats the water that runs through the pipes to heat your house. The water does not heat up to temperatures that are more than just warm. But you notice that the temperature in your house is staying right where you want it to be.
This boiler is no ordinary boiler. It knows what the temperature is outside and varies your water temperature to make just the heat needed to keep you comfortable. The modulating boiler also runs much more then a normal boiler would but you can see by your gas bill that you are getting great efficiency from this thing.

The feature that makes this wonder so great is that it has the ability to vary the fire that heats the water up and down so that the water temperature stays precisely where the computer brain in the boiler wants it to be. This temperature is figured by measuring the outdoor temperature and changing the water temperature based on that. The colder the weather is outside, the hotter the water is going through your system.

With a system like this you will notice that your heat will run longer and still not cost anymore money. This makes you more comfortable. The modulating boiler will give you just enough heat to keep you warm without wasting much of the heat that a normal boiler would. This type of furnace will give you the most efficient heating possible on any given day.

Before buying a new heating system or replacing your old hot water boiler make sure that you check into a system that will modulate the fire and also vary your heating water temperatures according to the outdoor temperatures. This will save you money and give you a very comfortable heating system.

on Dec 08, 2009 | 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

My honeywell timer for the back boiler heating is blank


need to contact the people who worked on it yesterday to come back and look at it again because it sounds like you have no power to now.

Jan 29, 2010 | Honeywell CT3600 7 Day Electronic...

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Boiler Replacement -When to do it


Your boiler is on the blink. Now you have some big decisions to make. Do I get another opinion? How much will it cost to replace the boiler as opposed to fixing it? How much energy will be saved? Home heating with a hot water heating system is a very good way to heat. However, when the boiler does not work or leaks there are many things to think about. The troubleshooting ideas in this article will work for both steam and hot water boilers.

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If there is no water running out of the boiler and it is just a control issue it may be best to get another opinion. If there is water running then there is a stop leak liquid that can be placed into the boiler as a temporary fix. It should be viewed as temporary and not a permanent fix. Either a section of the boiler will have to be replaced or the boiler may need to be completely replaced.

If the boiler is fairly new and the warranty will pay for some of the cost then replacing a section may be the way to go. Bear in mind though, that the warranty rarely covers the labor cost. Labor will need to be paid by the homeowner. If the boiler is more than 20 years old then it is a no-brainer, replace it, the increased efficiency combined with the age of the existing boiler make it a simple decision. Oil boilers especially are very much on a down hill slope by 20 years, gas boilers are often in better shape even though the efficiency is way down from what today's are. So bottom line, replace if older than 20 years. For boilers in the 10-15 year range it is often a very difficult call. Work with your heating service expert to figure the best option and I would definitely get a second or even a third opinion.

The next cause of trouble could be a failure of the controls on the boiler. Once again I would go with the 20 year rule. Unless the control that failed is relatively inexpensive I would replace the boiler. Often I have seen that when one control fails other controls are soon to follow and the beast becomes a money pit. This is especially true of oil burners. Many new boilers now come with a five year full replacement warranty that even cover labor. Once again the really hard questions come for those boilers in that five to fifteen year old age bracket. The questions get even harder when you are without heat, it is freezing outside and you do not have the time to get other opinions. At this point you have very limited options. Do make sure that you get a cost for the repair before you give the permission to fix the boiler. Electrical controls are not returnable once they have been installed. So once installed you bought them.

Questions about boiler failure and replacement are many. This should give a brief overview of the options that are available for the homeowner. There are many variables and often no answer is the completely right one. Many things depend on the situation of the homeowner, the age of the boiler, the cost of the repair, and the efficiency of the existing boiler as opposed to the efficiency of a new boiler. Many times that all adds up to a judgment call between the homeowner and the heating company.

on Dec 06, 2009 | Heaters

1 Answer

I have an ideal standard he30 boiler instaledi have an ideal standard he30 boiler instaled about 6 weeks ago. the boiler keeps losing presure about half a bar every 2 days if i dont top it up it will trip...


Hi,
You have a problem that the installer does not know how to fix so they are just stringing you along hoping that you will give up and find some one else or forget about it..
You need to tell them to
1. fix the boiler correctly
2.take it back out and give you a new one at their expense
3. or tell them you will call another comapny to fix it and will give the bill to them to pay.
You did not get what you have paid for... do not pay them any money to come out and troubleshoot the boiler.
The boiler should work as the instructions say or someone did something wrong...
Sometimes it is best to call the boiler company and talk directly to their Tech. Support people.


I hope that this will help you to solve your problem!

Thanks for using Fixya!!

Heatman101

Dec 24, 2009 | Heaters

1 Answer

Have a problem with a laars mini therm ii boiler. the pilot keeps


hi. i have mini temp boiler 150 btu 5yers old . it is burning with know radiation .it is up to thempitio .but it will not shut off.flame is good radietor is hot ,help?

Nov 04, 2009 | Lite On Laars Lite 2 Heaters: 250,000BTU...

1 Answer

Boiler won't fire even though the pilot is lit


Check if the ignition plug works. Upon putting your boiler on, a spark will normally trigger the
the firing. Then, check the ignition transformer if it works. Check the secondary voltage which is between 15000 to 20000 volts to trigger the ignition plug and the boiler to fire. If no spark,
have your ignition transformer replaced to make it work.

Sep 21, 2009 | Heaters

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