Fixing 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 function for your safety.

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

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

How a Low Pressure Switch Works

Pressure switches are an important part of the heating process.

Here’s how your furnace acts after the thermostat begins to 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 sucks 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 signals the control board to ignite the furnace.
  • Your furnace ignites and heats your space.

A two-stage furnace has several pressure switches, which allow it to run at various speeds—and be more efficient.

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
  • Plugged condensate drain
  • Cracked hose

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

Your furnace will tell you there’s an issue with a red flash from its indicator light, which it uses to exhibit 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 price to fix your furnace depends on the issue it has and the time 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 handle the fault code and get your heat moving again.

Call us at 561-629-1826 or schedule an appointment online today.