Why is my cylinder frozen?

Your cylinders may ice up simply because you have been selling a lot of beer, especially lager. However, the icing may indicate that there is a fault somewhere:

If the cylinder is frozen at the bottom, you may have a leak on your brewery line - contact your brewery

If the cylinder is frozen at the top, there has been a major gas leak: you must take action immediately

See our guide on how to spot a gas leak: