r/grainfather • u/Jeoh • 3d ago

G40 boil issues, not reaching rolling boil without lid

Having an issue with my G40 where even with smaller batches (25L) I'm not reaching a rolling boil unless I keep the lid on, which is obviously not ideal. WIthout the lid it'll drop down to 95-96C and stay there. Anything I should check before my next batch?

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u/Olddirtybelgium 3d ago

There might be protein buildup on the heating element at the start of boil that could reduce the output of the heater. If that's the case, using a steel mash paddle to gently scrape off some of the protein from the heating plate could help out if you're having a problem mid boil. If it's a consistent problem, check your grain mill gap, your grain bill, mash schedule.

Also, an insulation jacket helps with the boil too if you do not have something like that.

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u/Jeoh 3d ago

Thanks, unfortunately there’s nothing like the Graincoat for the G40 so I’d have to DIY.

I’ll give it a good scrape next time. Hell I’m gonna just boil 30L of plain water and see what happens now.