Clearing Error Code 223 on Your Lennox® Furnace

Getting cold because you’re seeing error code 223 from your Lennox® furnace?

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

Depend on the Experts at Levy & Son Service Experts to deal with fixing this furnace error. Our NATE-certified technicians are among the best in the industry when it comes to recognizing and repairing furnace issues.

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

How a Low Pressure Switch Works

Pressure switches are a necessary part of the heating system.

Here’s how your furnace acts after the thermostat begins 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 pulls in new gas and air so the burners can start.
  • When the pressure switch senses that sufficient air is being brought into the burners, it closes and signals the control board to ignite the furnace.
  • Your furnace ignites and heats your space.

A two-stage furnace has several pressure switches, which allow it to run at various speeds—and use energy more efficiently.

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
  • Clogged condensate drain
  • Cracked hose

There could also be a problem 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 display 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 reiterates 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 the usual 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 Levy & Son Service Experts

When you need furnace service, you can lean on the professionals at Levy & Son Service Experts to handle the fault code and get your heat working again.

Call us at 469-250-0932 or schedule an appointment online today.