Halocho #1573 - Extinguishing fire on Yom Tov is forbidden

Extinguishing fire is forbidden on Shabbat and Yom Tov.

Even though one may light fire from an existing flame on Yom Tov, one may not extinguish fire on Yom Tov.

One may not even lower a flame on Yom Tov (nor on Shabbat). (Some Poskim permit one to lower a flame during cooking, but only to prevent the food from burning.)

On Yom Tov (and on Shabbat) one may not put a candle in a windy place so that it will blow out.

(Yom Kippur has the same status as Shabbat; one may not light nor extinguish fire on either.)

Source: Kitzur Shulchan Aruch 98:25

- Danny
Monday, 15 Iyar 5775, 30th day of the Omer

אָסוּר לְכַבּוֹת אֵשׁ בְּיוֹם טוֹב. וַאֲפִלּוּ לִגְרֹם כִּבּוּי, אָסוּר. וְלָכֵן אָסוּר לְהַעֲמִיד נֵר דּוֹלֵק בְּמָקוֹם שֶׁיָּכוֹל לִנַשֵׁב הָרוּחַ וּלְכַבּוֹתוֹ. וְאַף עַל פִּי שֶׁעַתָּה אֵין הָרוּחַ מְנַשֶׁבֶת. וְכֵן אָסוּר לִפְתּוֹחַ דֶּלֶת אוֹ חַלּוֹן כְּנֶגֶד הַנֵּר הַדּוֹלֵק