Taking down a Mezuzah from a door that was sealed off

Question

If someone sealed off a door in their home when doing construction, in a way that the door can no longer be used, can the mezuzah that is there now be taken down since the down since the door is no longer in use? .

(Although there is a different point over here in regards to what it says in the Tzvah of Rebbe Yehuda HaChossid we'll put that point aside -- perhaps they made a hole in the door, etc.)

This seems simple and I'm sure it can be taken down. However, I'm wondering if there is anyone that says not like this. Or in general any achronim/poskim/seforim that discuss this situation.

Answer 1

The Kitzur Shulchan Aruch (11:1) mentions that a door that is only opened on rare occasions (like when deliveries are being made) while most of the time another door is used for access to the room, then the first door is except from a Mezuzah.

It would follow that a door that you can no longer use should be except from a Mezuzah.

The following is based on the footnotes of the Sefer titled קביעת מזוזה כהילכתה Ch 8.

If the door is simply sealed - and could be reopened - then the Poskim are in dispute if you can take down the Mezuzah. The Shevet Sofer (Yoreh Deah 92) and the Eshkol (Hilchot Mezuzah) allow one to remove the Mezuzah. The Igros Moshe YD I 177 requires it to have a Mezuzah unless it was permanently sealed with mortar or a permanent cupboard.

The footnote ponders what is considered sealed; what about if you lost the key, or placed a heavy cupboard in front of it or nailed it shut.

Some (Oruch Hashulchan 286:38) require the doorway to be destroyed - i.e. that the doorframe be removed, before it looses its requirement to have a Mezuzah.