Aquastat relay Buzzing / Chattering

Posted by Chris on November 08, 2004 at 06:40:49:

Hello,
I've got a very small home system running and oil fired Weil-McLain P-366HE WT Boiler. This also supplies hot water through a coil on that boiler.

There is only one thermostat and one zone. Actually it has two circulators but they are wired together as one zone in a very small home.

I have been hearing buzzing or chattering coming from the relay in the Honeywell Aquastat model L8124A1007. I know it's this relay because I can feel it. It only does this when the boiler shuts off. I thought I had solved it by spraying the contacts of that relay with cleaner a few months ago. however...

Yesterday it started buzzing again so I replaced the Aquastat unit with a new L8124A. To my surprise the new unit has the exact same problem.

I'm stumped. any ideas?
Thank you very much,
Chris

Follow Ups:

• Re: Aquastat relay Buzzing / Chattering Chris 18:05:10 1/10/2005 (0)
• Re: Aquastat relay Buzzing / Chattering Chris 08:37:27 11/22/2004 (0)
• Re: Aquastat relay Buzzing / Chattering Weezbo 00:11:57 11/18/2004 (1)
  • Re: Aquastat relay Buzzing / Chattering Chris 07:16:51 11/22/2004 (0)
• Misc boiler questions Jeff 10:38:49 11/17/2004 (1)
  • Riello and a weil mclain466e Michael 11:36:19 11/17/2004 (0)
• Re: Probably Low voltage on incoming power line HeatPro 19:09:53 11/11/2004 (0)
• Re: Aquastat relay Buzzing / Chattering HeatPro 07:43:24 11/10/2004 (0)

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