Originally Posted by whutever
JMass, thanks for the info. I use buckets and there was lots of activity in the air locks prior to my putting them in the fermenter (read temp controlled chest freezer). Now I don't see anything in them but I know that's not a good indicator. My primary concern was it being to cold. So the temp range is the same as US05 - thanks for that. Looks like I'm good to go.
Whutever, I checked a few more sites for Safale 04. According to MoreBeer
"Recommended temperature range: 64ÂºF-72ÂºF"
Homebrew Heaven: recommended temperature range of 68-74 deg F.
ibrew.com (looks like the official pamphlet): Recommended fermentation temperature: 15C – 24C, so that is 59F to 75F
I saw another site that had different temperatures, but in the same ballpark as the 1st 2 above. I assumed that this yeast would follow the characteristics of other ale yeast, but apparently it is more finnicky(?)
a 2002 comment from the Beeradvocate:
"My experience with this yeast is that any temp above 68 causes off flavors, yet under 64 and it will just drop out - difficult for most homebrewers to accomplish."
However, there is some confusion between ambient temps and internal beer temps, so I'm not sure what temperature they are talking about. A later response to a runaway Krausen says:
"If ambient temps are 66 the internal temp is probably 70-74, too high for this yeast, unless you use a water bath. Hence the runaway kreusen."
If there is absolutely no activity now, just take the specific gravity. Some responses I've read said that the yeast may ferment out in only a few days. If the SG is still too high, you may need to repitch the yeast.