Clearing Error Code 223 on Your Lennox® Furnace

Feeling a chill 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 your protection.

Depend on the Experts at Service Experts Heating & Air Conditioning to handle repairing this furnace error. Our NATE-certified technicians are among the brightest in the industry when it comes to diagnosing and repairing furnace problems.

Your satisfaction is critical to our team. 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 an essential part of the heating process.

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

  • Your furnace’s control board begins the draft inducer blower motor. This gets rid of combustion gases from the heat exchanger and brings in new gas and air so the burners can ignite.
  • When the pressure switch senses that enough air is being dragged into the burners, it closes and tells the control board to ignite the furnace.
  • Your furnace ignites and heats your home.

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

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
  • 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 feature 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 expense to fix your furnace depends on what’s wrong with it and the time 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 Service Experts Heating & Air Conditioning

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

Call us at 440-252-1375 or schedule an appointment online today.