The burner assembly and furnace cabinet should be grounded for safety and because most control boards for direct spark ignition or hot surface igniters will not operate correctly unless the unit is grounded.
A good HVAC system depends on routine furnace maintenance. As a homeowner, there are a number of straightforward things you can do to preserve the effectiveness of your HVAC system with relation to your furnace. The furnace cabinet itself must be used for several of these tasks. This article examines the furnace and explains its significance. The easiest approach to securely access your furnace is also described, allowing you to start inspecting and maintaining some of its internal parts.
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