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https://www.homebrewtalk.com/threads/no-visible-fermentation-activity-after-12-hours.383242/
As long as you didn't put it in a scalding hot water it will be fine. Might want to wait a little bit longer. Although I generally see the signs within the first 12 hours it's not unusual that it could take longer , like 24 or 36. Also, like kevinb says - check the fermentation temp.
https://www.homebrewtalk.com/threads/no-fermentation-after-24-hours.292827/
If you have no apparent signs of fermentation by late tonight take a SG reading and compare it with the original specific gravity (assuming you took one). If there's no change shake things up well and give it 12 more hours.
https://www.homebrewtalk.com/threads/no-fermentation-after-48-hours.167008/
Mar 8, 2010. #5. Without a starter, it may take up to 72 hours for fermentation to start in an ale. If you've made a lager, it might take signifantly longer. As long as your sanitation was good, the beer should be fine waiting for fermentation to start. It sounds like you got poor efficiency in this batch.
https://www.beeradvocate.com/community/threads/almost-4-days-later-and-no-fermentation.39914/
I've seen anywhere between 3-14 days of krausen on various batches. I'd say 4 days of krausen is nothing to worry about. Take a gravity reading if you are interested in its progress. I've your beer is about 80% done with fermentation at this point, then you should be …
https://homebrew.stackexchange.com/questions/14795/14-hours-after-pitching-little-to-no-activity-is-it-ruined
However, I was told by my LHS that I should see a lot of fermentation activity after around 4-12 hours. The brew itself is an Irish stout using Wyeast Irish Ale strain, I made sure to let the bag swell before pitching so I'm fairly sure that the yeast was viable. The temp is around 68-70 F. Currently (hour 14) there is a very small (1/4 inch ...
https://www.fermentingforfoodies.com/fermentation-nothing-happens/
No Fermentation One of the common concerns is what to do if there are no signs of fermentation after 24 to 48 hours. It doesn’t matter whether your sourdough never bubbles, yogurt doesn’t set, or the airlock in your wine isn’t bubbling, the causes are usually similar.
https://homebrew.stackexchange.com/questions/3790/36-hours-after-pitching-straight-from-the-vial-no-signs-of-fermentation-what-n
With Ales I expect to see signs of yeast life within 12 hours (in a 5-6 gallon batch). Pitching more yeast is an easy fix if no activity has begun at all. Nottingham dried …
https://www.dummies.com/food-drink/drinks/beer/homebrewing-problem-no-fermentation/
Fermentation problems occur frequently to homebrewers, and a common one is that the would-be beer just never started fermenting. Before you pour your homebrew down the sink, make sure the process actually hasn’t started — judging fermentation by the bubbles (or lack thereof) coming out of the airlock can sometimes be deceiving. Check for signs […]
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