What is a possible cause for no beer coming out of the faucet?

The scenario of no beer coming out of the faucet can indeed be attributed to an incorrectly attached keg coupler. The keg coupler is essential for connecting the keg to the draft system, creating a seal that allows for the flow of beer. If the coupler is not properly attached, it may not engage the valve on the keg, preventing the beer from flowing through the line and out of the faucet.

In terms of context, while high beer temperature can affect flavor and pour quality, it typically does not prevent beer from flowing altogether. High system pressure could lead to excessive foaming rather than a complete blockage. Dirty glassware might impact the pour quality as well, but it would not stop the beer from coming out of the faucet. Therefore, ensuring the keg coupler is correctly attached is crucial for proper beer dispensing.