New noises from old Burnham

hevysrf

I have a 1984 99k input Burnham boiler supplying about 50 linear feet of base board. Two Honeywell zone valves.

Some new noises while burner is on recently, best described as a creaking or muffled pop coming from the boiler.

As far as I can see nothing external has changed.

Pressure is about 14 psi in two story home.

Hydrostat 3200+ digital control killing burner at 190.

No visible leaks.

Doesn't seem to be taking makeup water.

No air coming out of air separator, but if I remove the red cap it will drip water, don't think its clogged.

Relief not popping.

Temp differential on expansion tank in about same location as always ,(about a 1/4 of the way up).

Grundfos Alpha set on auto, reads 0 gpm and 7 watts with one zone calling, as always.

We did lose power for 7 hours during the last storm but outdoor temps didn't drop below 25 and house was heated with 36k gas fireplace,

Been in this home 25 years, very reliable unit, is there a need to worry or have something checked?

Intplm.

A new noise? Did it start after the power outage? Seems from your description the boiler is working fine other that the noise. Sounds are hard to give info on from here. Can you possibly post a video of the noise?

hevysrf

New noise, you might hear it at about 8 sec into video.

https://www.flickr.com/photos/190572795@N03 /55126105004/in/dateposted-public/

Steamhead

Link didn't work.

hevysrf

Having trouble with link

ethicalpaul

Try this fixed version:

https://www.flickr.com/photos/190572795@N03/55126105004/in/dateposted-public/

Intplm.

Wasn't really able to hear the concern described.

hevysrf

Thank you for the link.

Noise isn't very pronounced, at about 7 or 8 seconds.

hevysrf

Could these sounds be "kettling"?

I replaced a zone valve about 3 years ago and added Sentinel X100 corrosion after bleeding, is it time for another treatment?

Intplm.

I put my ear buds in and turned up the volume. Not a noise that seems unusual.

hevysrf

Thank you

ethicalpaul

To me it could be a tiny bit of hammer or maybe expansion. It does not create concern to me.

JUGHNE

I think I can hear a little "kettling"…….very little.