Fixing Error Code 223 on Your Lennox® Furnace

Getting chilly because you’re getting error code 223 from your Lennox® furnace?

This is telling you your furnace’s low pressure switch is open. Due to the failure, your system will not function for your safety.

Turn to the Experts at Broad Ripple Service Experts to handle mending this furnace error. Our NATE-certified technicians are among the brightest in the industry when it comes to understanding and repairing furnace troubles.

Your satisfaction is important to us. That’s why we back our furnace repair work in Indianapolis with a 100% Satisfaction Guarantee* for a year.

How a Low Pressure Switch Works

Pressure switches are an important part of the heating operation.

Here’s how your furnace acts after the thermostat starts to call for heat:

  • Your furnace’s control board begins the draft inducer blower motor. This pushes out combustion gases from the heat exchanger and brings in new gas and air so the burners can fire.
  • When the pressure switch senses that a suitable amount of air is being brought into the burners, it closes and tells the control board to ignite the furnace.
  • Your furnace ignites and heats your home.

A two-stage furnace has more than one pressure switches, which permit it to run at various speeds—and be more efficient.

What Happens When a Low Pressure Switch Acts Up

The low pressure switch may be open for several reasons.

There could be a:

  • Obstructed vent
  • Stopped condensate drain
  • Cracked hose

There could also be a problem with the switch itself, the inducer or the circuit board.

Your furnace will tell you there’s an issue with a red flash from its indicator light, which it uses to exhibit error codes. It has this red light to flash code, like Morse code.

You might notice fast flashes or an alternating slow flash as it replays a fault code.

Estimated Repair Cost for Furnace Error Code 223

The price to fix your furnace depends on the issue it has and the hours it takes to repair it.

Here are average replacement costs for several components that could be affected:

  • Pressure switch—$40 to $350
  • Inducer—$600 to $1,500
  • Circuit board—$200 to $600

Call the Experts at Broad Ripple Service Experts

When you need furnace service, you can trust the professionals at Broad Ripple Service Experts to work on the fault code and get your heat flowing again.

Call us at 317-527-0271 or schedule an appointment online today.