Condensing Furnace Problems

Condensate Issues

• Condensate refers to the water condensed into droplets as the furnace takes back the heat from the air. This water is typically acid in chemical composition. As it accumulates in the furnace, it can damage the heat exchanger used to reclaim the heat. While heat exchangers are often made of galvanized metal for protection, corrosion can still be an issue.

Draining Problems

• Draining problems can be especially serious for condensing furnaces, since they produce more water than other furnaces. The drain pan for the furnace needs to be well-made and allow for easy drainage from the furnace directly outdoors. Going through a chimney can create mortar corrosion issues, and drains that are left alone can eventually develop clogs that must be cleared.

Electrical Problems

• Condensing furnaces can have their share of electrical problems too. If the thermostat has faulty wiring or if the heat exchanger circuitry becomes damaged, the furnace won't work at all. These problems are difficult to pinpoint without the help of a professional, but they may be related to a condensation leak.

Blower Issues

• Blowers are fans that propel air away from the furnace when sufficiently heated. Blowers also have electrical problems with motors and run capacitors. Dirt and dust can also impair the efficiency of blowers, creating airflow problems and forcing the furnace to work for longer, wasting energy.