Resolving 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 run for your protection.

Trust the Experts at Boehmers/Cronin Emery Service Experts to handle fixing 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 essential 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 important part of the heating system.

Here’s how your furnace starts after the thermostat starts 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 start.
  • When the pressure switch senses that enough air is being pulled into the burners, it closes and triggers the control board to ignite the furnace.
  • Your furnace ignites and heats your house.

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

What Happens When a Low Pressure Switch Malfunctions

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

There could be a:

  • Obstructed vent
  • Stopped 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 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 issue it has and the time it takes to repair 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 Boehmers/Cronin Emery Service Experts

When you have to have furnace service, you can call on the professionals at Boehmers/Cronin Emery Service Experts to work on the fault code and get your heat working again.

Call us at 519-804-1617 or schedule an appointment online today.