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Gas heat radiators in the home

For the past three years, ever since my friend helped me bleed my radiators, wrongly I suspect, heat only comes out of the top 1/4 of the radiator in three of the radiators in my home. They are gas heat. I've tried bleeding them again to no avail. It's VERY frustrating(and cold!!). Can anyone please help me?
Thanks so much.

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Re: gas heat radiators in the home

Hi there,

Not sure that I can help but will give it a go for you. I have never heard of bleeding Gas Heaters and usually they don't need that. Work on one heater at a time. If you can blow compressed air through the lines this may clear the flow. Best way is if you can get to the gas lines by removing a cover and then remove the gas line as close to the gas source. Gas heaters tend to carbon up and the air pressure tends to clear them. If you can't get to the gas lines you can try blowing the air back through the main jet at the front of the heater. Sounds to me like the jets are partially clogged and just need to be cleared. If you manage to remove the main pipe make sure you tighten it back up to avoid any gas leaks. Before trying to light it check for gas leaks as well. Hope this helps


Posted on Jan 05, 2008

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see the following steps:
If the unit produces no heat, raise the thermostat, check switches, fuses, circuit breakers, and the water level. Also check the burner's safety controls (see below).
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If only some radiators in the system heat up, bleed air from the cool units (see below). If you suspect that the circulator requires repair, call an experienced serviceperson.
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If you have a water heating system where you use hot water to heat your home, you may have to bleed your baseboard radiation or cast iron radiators which ever you happen to have installed in your home.


Any time you let the pressure out of your system you can get air into it. For the system to work properly and quietly you need to release the air out of the system.

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The next thing is to find the bleeder valve or valves on your system. Some systems will have many bleeders. Cast iron radiators will have one on each radiator near the top and baseboard heating systems will have one per loop at the highest point of each loop. When you open the bleeder you will get a foul smelling air out of the bleeder valve. Leave the valve open as long as air is coming out of it. If it is spitting and puttering, leave it open and catch the water till it comes as water only. This process can take a long time for some systems.

To open the valves sometimes you may need to use a special tool. Some valves have a four sided stem and others may have different configurations. Some you can get too with a needle nose pliers and others will accept a screwdriver. Many of the special tools can be found at stores like Lowes or Home Depot. HVAC supply houses often have them also.

The bottom line here is that air in your system is not good it will decrease the heat output of your system and you will hear the water running through the system when it should be very quiet. Releasing the air from your system will ensure top efficiency and performance of your heating system.

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Have a rinnai high efficiency 30 every thing seems to be working ok but dosnt seem to be throwing out much heat. my gas stove also seems to be not geeting full flame ,checked tap on the meater and is...

Since you're having basically the same issue with two separate gas appliances in the same home, I suspect it's a pressure problem with your home's main gas regulator/meter. In which case, this is not something you want to attempt to repair. Contact the company that provides you gas. Also, ask your neighbors, if they are experiencing the same problem. As it may be something else wrong with the main gas line feeding your neighborhood.

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Doesn't heat up as first bought three years ago.

Not unless it leaks oil on the floor. The oil has nothing to do with heating, your unit is actually an electric heater with oil added as "thermal ballast."

The first suspect is the plug that you plug into the wall. These sometimes overheat and electrical continuity is lost.

Solution: new plug from the hardware store. Cut off the old one and take it with you so you can get something very similar. Don't do anything if you're not comfortable with handyman-level electrical repairs.

Next suspect is the cord itself. These have a hard life on electric heaters.

After that you're inside the unit. First suspect is the thermostat, since it's the only moving part. A burned out heating element, or a burned wire connection, is possible, but not the first thing to look for.

Generally, this kind of heater often lasts for years and years--and often doesn't. Once you're past replacing the plug it's not unlikely that repair will cost more than a new heater.

I'm not shilling for Home Ripoff, but they have a $60 "baseboard" (type) heater with remote control that I'm looking at, I've read good reviews about it. However look closely, it's very long, and sticks out from the baseboard more than you might expect.

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Feb 16, 2010 | Heaters

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Some of the baseboard heaters don't get hot. It is an old (1970) boiler system. Is there somewhere on each individual unit to turn it on? I'm baffled, I just assumed the hot water would run through all of...

No the water does not have to run through all of them....if you have what is known as a mono-flo system.
With this type of system there are tees that divert some of the water to the radiator and some of the water bypasses and goes on to the nest radiator and so on....

If you look on the radiators that are not getting warm or any of the rads for that matter you will see a silver bleeder valve. Some of these take a "key" to open and some just have a screw driver slot.
If you open the beleeder you will probably get air out of the radiator. Leave the bleeder open till the valve spurts water out, then close it.
Continue this until all the rads are full of water.
If no air or water comes then your "fill Valve" on the boiler may be faulty and not allowing water into your system. You may need to replace that and then bleed the rads.....
Bottom line.... air does no heating, the rads must be full of water to make heat. Air in the rads also air locks that loop in a mono flo system...thus no heat...
Sometimes even after bleeding it can take sometime for the water to start flowing through a rad again... be patient...

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

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