Fixing Error Code 223 on Your Lennox® Furnace

Getting chilly because you’re seeing 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 work for your protection.

Turn to the Experts at Finch Air Conditioning & Heating Inc to take care of 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 essential to our business. That’s why we back our furnace repair work in La Porte 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 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 brings in new gas and air so the burners can fire.
  • When the pressure switch senses that enough 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 permit it to run at various speeds—and use energy more efficiently.

What Happens When a Low Pressure Switch Fails

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

There could be a:

  • Blocked vent
  • Clogged condensate drain
  • Cracked hose

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

Your furnace will show you there’s something wrong with a red flash from its indicator light, which it uses to feature 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 expense to fix your furnace depends on the issue it has and the hours it takes to remedy 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 Finch Air Conditioning & Heating Inc

When you need furnace service, you can lean on the professionals at Finch Air Conditioning & Heating Inc to work on the fault code and get your heat working again.

Call us at 281-407-9478 or schedule an appointment online today.