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coil-failureWhy do water, steam, and refrigerant coils fail?

There are many causes of coil failure. Here are some of the most common causes.

Coil Plugging:

Poor or a lack of proper cleaning will result in a build up of dirt on the coil. This significantly impacts heat transfer, and increases the air pressure drop across the coil.


If the coils are installed near a moving piece of equipment (e.g. a fan) that is not properly isolated, the vibration can eventually cause leaks. This is because the tubesheet holes will eventually cut through the tubes.

Corrosive Environment:

Both in the air or inside the tubes, a corrosive substance will eventually eat through the coil and cause it to fail. This can be combated with heavier or more resilient materials (e.g. stainless steel or cupro-nickel), as well as coatings.

Freezing Temperatures:

Damper or freeze-stat failure can cause a coil to be subjected to below-freezing temperatures, which can cause the tubes to burst quickly if the coil is not drained properly. This is because ice build up in the tubes increases the pressure until the tube ruptures, typically at the u-bends.

When replacing a coil, partner up with a team who will walk you through the engineering and explain it along the way. Mainstream has decades of experience and we know how to make sure everything from the quote to the installation go smoothly.

Send us a message to learn more!