Resolving Error Code 223 on Your Lennox® Furnace

Feeling a chill because you’re seeing 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 work for your safety.

Turn to the Experts at Service Experts Heating & Air Conditioning to take care of mending this furnace error. Our NATE-certified technicians are among the best in the industry when it comes to diagnosing and repairing furnace issues.

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

How a Low Pressure Switch Works

Pressure switches are an important 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 sucks in new gas and air so the burners can start.
  • When the pressure switch senses that a suitable amount of air is being pulled 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 several pressure switches, which permit it to run at different speeds—and use less energy.

What Happens When a Low Pressure Switch Malfunctions

The low pressure switch may be open for several reasons.

There could be a:

  • Obstructed vent
  • Stopped condensate drain
  • Cracked hose

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

Your furnace will show you 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 price to fix your furnace depends on the issue it has and how long 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 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 318-588-8163 or schedule an appointment online today.