Clearing Error Code 223 on Your Lennox® Furnace

Getting cold because you’re noticing 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.

Depend on the Experts at Sunbeam Service Experts to handle fixing this furnace error. Our NATE-certified technicians are among the brightest in the industry when it comes to understanding and repairing furnace problems.

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

How a Low Pressure Switch Works

Pressure switches are an essential part of the heating operation.

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 pushes out combustion gases from the heat exchanger and brings in new gas and air so the burners can start.
  • When the pressure switch senses that enough air is being dragged 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 a few pressure switches, which permit 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 several reasons.

There could be a:

  • Blocked 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 an issue with a red flash from its indicator light, which it uses to display 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 cost to fix your furnace depends on the issue it has and the hours it takes to fix it.

Here are the usual 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 Sunbeam Service Experts

When you have to have furnace service, you can call on the professionals at Sunbeam Service Experts to take care of the fault code and get your heat moving again.

Call us at 716-427-6807 or schedule an appointment online today.