Resolving Error Code 223 on Your Lennox® Furnace

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

This indicates your furnace’s low pressure switch is open. Due to the malfunction, your system will not run for your safety.

Depend on the Experts at Bob Brown Service Experts to handle mending this furnace error. Our NATE-certified technicians are among the elite in the industry when it comes to recognizing and repairing furnace problems.

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

How a Low Pressure Switch Works

Pressure switches are an important part of the heating process.

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

  • Your furnace’s control board begins the draft inducer blower motor. This pushes out combustion gases from the heat exchanger and pulls in new gas and air so the burners can start.
  • When the pressure switch senses that sufficient air is being pulled into the burners, it closes and tells the control board to ignite the furnace.
  • Your furnace ignites and heats your house.

A two-stage furnace has a few pressure switches, which help it to run at multiple speeds—and use less energy.

What Happens When a Low Pressure Switch Malfunctions

The low pressure switch may be open for a variety reasons.

There could be a:

  • Obstructed vent
  • Stopped condensate drain
  • Cracked hose

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

Your furnace will let you know 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 observe fast flashes or an alternating slow flash as it replays a fault code.

Estimated Repair Cost for Furnace Error Code 223

The cost to fix your furnace depends on the root problem and how long it takes to remedy 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 Bob Brown Service Experts

When you have to have furnace service, you can call on the professionals at Bob Brown Service Experts to take care of the fault code and get your heat working again.

Call us at 623-243-4517 or schedule an appointment online today.