Fixing Error Code 223 on Your Lennox® Furnace

Getting cold because you’re getting error code 223 from your Lennox® furnace?

This is telling you your furnace’s low pressure switch is open. Due to the failure, your system will not work for your safety.

Depend on the Experts at Teays Valley Service Experts to take care of mending this furnace error. Our ACE-certified technicians are among the elite in the industry when it comes to understanding and repairing furnace troubles.

Your satisfaction is critical to our team. That’s why we back our furnace repair* for a year.

How a Low Pressure Switch Works

Pressure switches are an important 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 exhausts combustion gases from the heat exchanger and pulls in new gas and air so the burners can ignite.
  • When the pressure switch senses that a suitable amount of air is being brought into the burners, it closes and triggers 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 multiple speeds—and use energy more efficiently.

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 show you there’s something wrong 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 see 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 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 Teays Valley Service Experts

When you need furnace service, you can trust the professionals at Teays Valley Service Experts to take care of the fault code and get your heat flowing again.

Call us at 304-760-5088 or schedule an appointment online today.