Fermentation temp is important- too hot or too cold and you will kill your yeast.
What kind of mash and what type of yeast are you using?
I ferment in my basement which is a pretty steady 68 degrees which works well. If you ferment too hot you can pickup a lot of off flavors and if you ferment too low fermentation can take long time or get “stuck” and not finish fermenting.
Let us know what mash and yeast you are using.