Resolving Error Code 223 on Your Lennox® Furnace

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

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

Turn to the Experts at All American Air 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 important 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 an essential part of the heating process.

Here’s how your furnace works 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 fire.
  • When the pressure switch senses that enough air is being dragged into the burners, it closes and signals the control board to ignite the furnace.
  • Your furnace ignites and heats your home.

A two-stage furnace has a few pressure switches, which help it to run at multiple speeds—and use energy more efficiently.

What Happens When a Low Pressure Switch Acts Up

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

There could be a:

  • Obstructed vent
  • Plugged 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 a problem 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 reiterates a fault code.

Estimated Repair Cost for Furnace Error Code 223

The expense to fix your furnace depends on the root problem and the hours it takes to fix 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 All American Air Service Experts Heating & Air Conditioning

When you have to have furnace service, you can lean on the professionals at All American Air Service Experts Heating & Air Conditioning to take care of the fault code and get your heat moving again.

Call us at 386-310-2061 or schedule an appointment online today.