aquastat replacement

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Old 12-13-07, 10:36 AM
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aquastat replacement

I have an old honeywell aquastat on a new Dunkirk boiler. Every once in a while the boiler refused to kick on. If I tap on the side of teh aquastat, the boiler begins to function again. Should the aquastat be replaced, and is this something I can replace myself. I'm a novice when it comes to oil furnace systems, but I'm a quick learner and can certainly swap "wire for wire" is there are no tricky "plumbing connections" to deal with.

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Old 12-13-07, 03:20 PM
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I wonder why there's an old aquastat on a new boiler ? didn't the new boiler come with an aquastat ? anyway...

There really isn't anything 'tricky' to changing one out. Since you say this is a new boiler, even if they used the thermal compound in the well, it probably won't have hardened up any by now. Sometimes they can be a bear to get out if they've been installed a while.

Basically, just remove and tag the wires... loosen the clamp screw on the well, slide the old one out, and the new one in. Make sure to read the install notes about the sensing bulb to be sure you've got it bottomed in the well and in good thermal contact. Replace the wires... and go...

Tip: Take several pictures before you remove the old one, just in case you need to refer to them to re-install.
 
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