Without regular servicing, the efficiency and reliability of the appliance will be affected

Reasons could include:

·         Excessive smoke and partially burnt fuel deposits can cause soot to form within the appliance heat exchanger. This restricts the amount of heat that can be transferred into the heating system water. The cleaner the heat exchanger, the more efficient the appliance will be.

·        Fuel nozzles regulate how much fuel passes through the burner. Nozzles are consumable items that wear over time, affecting combustion and lowering boiler efficiency. If they are not replaced this may cause “sooting up” of the heat exchanger due to too much fuel passing through the burner.

·         Fuel pumps contaminated with debris and/or water can cause premature failure.

·        Flame sensors can glaze over with deposits. Flame sensors are an important safety feature which detects whether the appliance has lit. If a flame sensor is dirty it may not be able to detect the burner flame correctly and could cause the appliance to shut down randomly. Appliances frequently switching on and off will be less efficient than those running for longer periods.

·        Electrodes can wear and attract soot and deposits. Electrodes produce a spark to light the fuel, if they are worn or in poor condition, the appliance may not light. Again, this causes inconvenience, inefficiency and increases fuel costs.