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John O
Joined: 30 Jan 2003
Posts: 1
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 Posted: Thu Jan 30, 2003 9:34 am Post subject: Help-circulating pump can't pump |
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| My circulating pump for my first floor zone tries to turn but the shaft won't. I am able to get the shaft to turn a small amount but very difficultly. Finally after a while, the set screw from the pump to the shaft let go and the pump spins on the shaft. What could be causing the shaft not to turn? |
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Ian
Moderator
Joined: 18 Feb 2003
Posts: 32
Location: wigan
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| Posted: Tue Feb 18, 2003 7:27 pm Post subject: Re: Help-circulating pump can't pump |
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| John O wrote: | | My circulating pump for my first floor zone tries to turn but the shaft won't. I am able to get the shaft to turn a small amount but very difficultly. Finally after a while, the set screw from the pump to the shaft let go and the pump spins on the shaft. What could be causing the shaft not to turn? |
oxide build up on the pump can cause it to seize  |
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