Gas Boiler Circulating Pump operating abnormally


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Old 12-17-09, 04:17 PM
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Gas Boiler Circulating Pump operating abnormally

I believe I have a problem with my pump. The past two times I've started my boilder, the pump has been slow to start. When the furnace kicks on, the impeller starts to move and then stops abruptly. A minute or less goes by and it tries to move again and I just hear a click. It takes several of these attempts before it actually moves normally and all is well. Once I get it to start normally, it circulates the water just fine and there are no issues with the pump or any strange noises.

If the pump is working normally and the system is warm and I shut it off and restart the boiler, there are no problems. It seems to be a cold start problem.

I'm using a B&G Booster Series 100. I have included a link below which shows a picture. The part in question, which I believe is the impeller, is located just below the black label on the booster that provides the model number, etc.

Is my pump going bad or just this part? Any advice would be appreciated as we're hosting X-Mas this year and the timing is just about right for a cold house after Santa arrives.

I am the opposite of mechanicalyl inclined, so the simpler the better if you're able to offer me any advice.

I'm just trying to nurse this system along until I can replace it early next year. I just want to do enough to keep my house warm for another month or two. Appreciate any guidance you can provide.

http://i971.photobucket.com/albums/a...s/DSC00032.jpg
 
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Old 12-17-09, 05:15 PM
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I would remove the pump and check for problems - possibly some kind of debris blocking the impeller. That will entail draining the system.

If all else doesn't fix it, replace it with a Taco 007. It should have the same flange-to-flange dimensions. Get the correct pipe size.
 
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Old 12-17-09, 05:22 PM
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Could be a low temp aquastat cycling the pump on low water temp ?
 
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Old 12-17-09, 05:26 PM
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Thanks

Appreciate the feedback. I have a tech from my local heating and air company coming out on Saturday morning to take a look.
 
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Old 12-17-09, 05:29 PM
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Originally Posted by TOHeating View Post
Could be a low temp aquastat cycling the pump on low water temp ?
forgive me, but i don't know what that means. this pump has been in my house since i moved in 8 years ago and has never done this, so whatever has happened, is a recent development.
 
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Old 12-17-09, 05:34 PM
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have you oiled it lately ?
 
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Old 12-17-09, 05:44 PM
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Originally Posted by TOHeating View Post
have you oiled it lately ?
i did a couple of weeks ago. i posted a week or so ago that i was having some noise in the system. i felt like it was air, but my pump was making some funky noises. i did lubricate it, in the event that was a contributing factor.

could i have over oiled the thing and gummed it up? i'm not even entirely sure i'm lubricating it in all the right places.
 
 

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