Lex Air Conditioning and Heating

Rust on Your Furnace? Here’s What it Means

If you have recently inspected your furnace and have discovered rust, you are understandably confused. Rust is corroded metal that usually develops when iron comes in contact with water. Your furnace, however, does not use water. Some water vapor is created through the combustion process as your furnace operates. While it may seem natural for the furnace to get rusty, the presence of rust is a serious cause for concern.

Is Rust on Your Furnace a Concern?

How Rust Develops on a Furnace

Inside a gas furnace’s heat exchanger, water vapor can develop as the temperature of combustion gas drops. Furnaces are designed with a flue and a condensate line for ventilation. This design minimizes the likelihood of rust development. When the ventilation features fail, the water vapor can create rust. This rust may develop on the interior and exterior surfaces and the heat exchanger.

The Detrimental Impact of Rust

Generally, exterior rust is less consequential than interior rust. Exterior rust can eventually cause severe damage, but internal rust poses a significant health risk. Rust on the heat exchanger can facilitate toxic gases seeping into the home. Interior rust may be much harder to see, so a professional furnace inspection should be completed regularly. If the heat exchanger is rusted, it should be replaced promptly. Older furnaces, however, generally should be upgraded if the heat exchanger is damaged.

Other Signs Signs it’s Time to Replace Your Furnace

Rust and age are only some of the tell-tale indicators that a furnace replacement may be necessary. Some of the other signs include:

  • Unusual sounds when it operates
  • Higher energy bills
  • Humidity issues in the home
  • An increasing number of repairs
  • Excessive dust or dirt circulating in the air

Regardless of your furnace’s age, it should be professionally inspected and serviced each year. An inspection will reveal developing issues so that you can address them before they become problematic.

Turn to the Frisco and Plano Heating Professionals

Whether your central heating system needs maintenance, a repair, or replacement, count on the experts at Lex Air Conditioning and Heating. For reliable service at a reliable price, we’ll ensure your home remains comfortable all through the winter. To schedule your appointment, call (972) 217-8955 or contact us here.

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