Clearing Error Code 223 on Your Lennox® Furnace

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

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

Trust the Experts at Pardee Service Experts Heating & Air Conditioning to take care of repairing 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 process.

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

  • Your furnace’s control board begins the draft inducer blower motor. This exhausts 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 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 allow it to run at different speeds—and be more efficient.

What Happens When a Low Pressure Switch Malfunctions

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

There could be a:

  • Blocked 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 repeats a fault code.

Estimated Repair Cost for Furnace Error Code 223

The cost to fix your furnace depends on the root problem 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 Pardee Service Experts Heating & Air Conditioning

When you require furnace service, you can lean on the professionals at Pardee Service Experts Heating & Air Conditioning to work on the fault code and get your heat working again.

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