Fixing Error Code 223 on Your Lennox® Furnace

Getting cold 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 work for safety reasons.

Trust the Experts at Service Experts Heating & Air Conditioning to take care of mending this furnace error. Our ACE-certified technicians are among the brightest in the industry when it comes to diagnosing and repairing furnace problems.

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

How a Low Pressure Switch Works

Pressure switches are a necessary part of the heating process.

Here’s how your furnace works 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 sucks in new gas and air so the burners can ignite.
  • When the pressure switch senses that sufficient air is being pulled into the burners, it closes and signals the control board to ignite the furnace.
  • Your furnace ignites and heats your house.

A two-stage furnace has more than one pressure switches, which help it to run at multiple speeds—and be more efficient.

What Happens When a Low Pressure Switch Acts Up

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

There could be a:

  • Obstructed vent
  • Clogged condensate drain
  • Cracked hose

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

Your furnace will tell you 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 see 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 hours it takes to remedy 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 Service Experts Heating & Air Conditioning

When you need furnace service, you can trust the professionals at Service Experts Heating & Air Conditioning to work on the fault code and get your heat flowing again.

Call us at 901-235-1196 or schedule an appointment online today.