Maintenance of a heating system is extremely important. This is not just blowing off the dust and making sure the boiler sits pretty. It involves intense cleaning of all important components of your heating system as well as introduction of chemical treatments that increase the longevity of your system.
Boiler components are exposed to the elements and harsh conditions while your system is operating year round. Without proper maintenance these parts can break when they don't have to. Many times a replacement will be recommended for a part that just needs to be cleaned.
Below are pictures of a LWCO of a system that's been operating for only one year. We see this on many boilers.