Sleepy yeast or just done?

[Lionman]

I had an incident with my fermenter heater, it died. The brew dropped to 12c before I noticed.

I checked the gravity and it was a bit high a little under 1.020 after starting at 1.065.

I bought heat belt and installed it, it rose up to 20c over night. No activity for a day or so so I gave it a gentle stir with a sanitised brew spoon. Another day or so later, nothing and all the yeast dropped again.

My question is, can I fix this or is it done?

Should I repitch some more yeast?

 

[tj2204]

More info needed.

What yeast & how much?
Mash temp & time?
Malt bill?

 

[Lionman]

I used a ~2L starter of WLP090.

Mashed at 65c for 90mins.

3.5kg pale
2kg Vienna
1kg Munich I

Was expecting FG of closer to 1.013

Pretty sure there was still a bit of yeast activity when the heater died.

Cheers.

 

[tj2204]

I'd try a fast ferment test before pitching any more yeast.

How long ago did you pitch?

1.065 to 1.020 is only 69% attenuation, i'd definitely be expecting a finish of 1.015 at the highest based on the info above.

 

[Lethaldog]

Have you checked the gravity after heating it up and stirring? No visible activity doesn't necessarily mean no activity!

 

[Tony121]

Had similar thing recently. Heated, swirled then dropped another 10 points without any indication anything was happening.