If the time has come for the furnace in your London home to be repaired or replaced, then it’s important you entrust the job only to licensed technicians. Furnace repairs are not a task to be trusted to just anyone as problems can be overlooked which can cause your furnace to be inefficient as well as dangerous to you and your family. Heating and cooling systems are complex and the technician you hire must be familiar with and competent in dealing with electrical wiring, airflow through heating ducts, refrigerant and combustion systems and the various safety concerns and issues when working with these. To insure your furnace repairs and installations are handled safely and effectively, only hire HVAC certified service providers to carry out the tasks. If you aren’t sure if your service provider is qualified, ask to see their certificates or look them up on province and local government websites that detail which contractors are best to deal with. In many provinces you will find municipalities insist that service providers meet with minimum education requirements. They are also expected to have passed a written exam and have a certain amount of on-the-job experience in order to achieve the license they require to operate in each specific province. Chat with your chosen service provider about these qualifications before hiring them.