Resolving Error Code 223 on Your Lennox® Furnace

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

This means your furnace’s low pressure switch is open. Due to the issue, your system will not function for safety reasons.

Turn to the Experts at Neal Harris Service Experts Heating, Air Conditioning & Plumbing to deal with fixing this furnace error. Our NATE-certified technicians are among the best in the industry when it comes to recognizing and repairing furnace issues.

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

How a Low Pressure Switch Works

Pressure switches are a necessary part of the heating process.

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 brings in new gas and air so the burners can fire.
  • When the pressure switch senses that a suitable amount of air is being dragged 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 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:

  • Closed off 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 something wrong 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 see fast flashes or an alternating slow flash as it replays 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 hours 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 Neal Harris Service Experts Heating, Air Conditioning & Plumbing

When you have to have furnace service, you can call on the professionals at Neal Harris Service Experts Heating, Air Conditioning & Plumbing to take care of the fault code and get your heat flowing again.

Call us at 816-787-0500 or schedule an appointment online today.