Posted on March 5, 2017
Included below is a partial list of generic stuff that different furnace manufacturers recommend be performed annually by a qualified heating technician:
- The vent system needs to be checked for blockage and/or leakage. This includes the outside termination and the connections at and internal to the furnace.
- Combustion gases must be analyzed and compared to the unit specifications.
- The blower access door needs to be checked to make sure it makes a tight seal at the furnace.
- The fresh air intake grills and louvers need to be checked for blockage.
- The heat exchanger needs to be inspected for rust and corrosion.
- The burners need to be checked for proper ignition, burner flame and flame sense.
- The drainage system needs to be checked for blockage and/or leakage. This includes the hoses internal to the furnace. The condensate drain and trap need to be cleaned, and the water replaced in the trap.
- The blower wheel needs to be checked for debris and cleaned if necessary (this requires complete removal of the blower wheel).
- An amp-draw test should be conducted on the blower motor and compared with what is listed.
- The wiring needs to be checked for corrosion and damage.
- The filters need to be checked (but this needs to be done much more frequently than annually).
In addition to this list, heating contractors say that they regularly do static air pressure checks, gas pressure testing and temperature rise checks.