greenpjs wrote in
:

Hi,
During a recent kitchen remodeling project, we had a sub-zero model
642 side-by-side installed. So far, it is everything we expected, but
I have an "Is this normal?" kind of question. Every time the freezer
door is opened and then closed, a vacuum is created by the warm air
contracting as it cools. The air that equalizes it enters through the
main seal around the door making a hissing noise for 15 to 30 seconds
during which time, the door can't be opened. I am impressed that the
freezer is sealed well enough to cause that to happen, but I would
think sub-zero would have added some sort of check valve to control it
rather than having it hiss at you for 30 seconds. The manual has a
"noises that are normal" section, but doesn't describe this. Is there
something that got blocked off during installation that I should open
up? The installers mumbled something about "That's to dehumidify the
moist air that entered the freezer while the door was open", but that
doesn't make a lot of sense to me.

One more detail. About 20% of the time, a gurgling sound is made in
addition to the air entering through the seal as though air was also
entering through the defroster drain line.

Thanks,
Pat



It's "normal" for my modestly priced Frigidaire freezer to do this, as
was it for the Sears-branded freezer before it. Sounds like much ado
about nothing.

--
Wayne in Phoenix

If there's a nit to pick, some nitwit will pick it.