I just brewed with what I now realise is a rather old Williams Brewing Kolsch kit. The yeast is Wyeast 2565 Kolsch and the packet has already expanded. I have no idea when it expanded, so I assume it must be months ago and that the yeast has already died/gone dormant. The manufacture date is 07 Jul 2014.
I have already ordered a replacement yeast packet which will hopefully arrive towards the beginning the week.
I have chilled my wort and it is now sitting in the fridge, where I can control its temperature. Right now I have it at normal refrigeration temperature (4°C). I will raise up the temperature suitable for fermentation before any pitching.
Pitch the expired yeast packet now and just let it be?
Pitch the expired yeast packet now, then also pitch the new one when it arrives?
Or throw away the old one and wait for the new one to arrive (and expand) then pitch that?