Clearing Error Code 223 on Your Lennox® Furnace

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

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

Turn to the Experts at Pardee Service Experts to handle repairing this furnace error. Our ACE-certified technicians are among the brightest in the industry when it comes to recognizing and repairing furnace problems.

Your satisfaction is important to us. That’s why we back our furnace repair* for a year.

How a Low Pressure Switch Works

Pressure switches are a necessary part of the heating system.

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

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

A two-stage furnace has a few pressure switches, which permit it to run at multiple speeds—and be more efficient.

What Happens When a Low Pressure Switch Fails

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 an issue with the switch itself, the inducer or the circuit board.

Your furnace will let you know there’s something wrong 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 what’s wrong with it and the hours it takes to repair it.

Here are expected 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 Pardee Service Experts

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

Call us at 843-410-6103 or schedule an appointment online today.