PLANNED SERVICE
The following items should be checked during an annual inspection. Power to the unit must be shut off for the service technician’s safety.
Fresh air grilles and louvers (on the unit and in the room where the furnace is installed) - Must be open and unobstructed to provide combustion air.
Burners - Must be inspected for rust, dirt, or signs of water.
Vent pipe - Must be inspected for signs of water, damaged or sagging pipe, or disconnected joints.
Unit appearance - Must be inspected for rust, dirt, signs of water, burnt or damaged wires, or components.
Blower access panel - Must be properly in place and provide a seal between the return air and the room where the furnace is installed.
Return air duct - Must be properly attached and provide an air seal to the unit.
Operating performance - Unit must be observed during operation to monitor proper performance of the unit and the vent system.
Combustion gases - Flue products must be analyzed and compared to the unit specifications.
Problems detected during the inspection may make it necessary to temporarily shut down the furnace until the items can be repaired or replaced.
Instruct the homeowners to pay attention to their furnace. Situations can arise between annual furnace inspections that may result in unsafe operation. For instance, items innocently stored next to the furnace may obstruct the combustion air supply. This could cause incomplete combustion and the production of carbon monoxide gas.
FAILURE CODES
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