Fixing Error Code 223 on Your Lennox® Furnace

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

This indicates your furnace’s low pressure switch is open. Due to the malfunction, your system will not work for safety reasons.

Trust the Experts at Eveready Service Experts 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 problems.

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

How a Low Pressure Switch Works

Pressure switches are a necessary part of the heating system.

Here’s how your furnace acts after the thermostat initiates the call for heat:

  • Your furnace’s control board begins the draft inducer blower motor. This pushes out 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 tells 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 permit it to run at different speeds—and use less energy.

What Happens When a Low Pressure Switch Acts Up

The low pressure switch may be open for several reasons.

There could be a:

  • Blocked vent
  • Plugged 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 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 how long it takes to repair it.

Here are average 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 Eveready Service Experts

When you need furnace service, you can trust the professionals at Eveready Service Experts to handle the fault code and get your heat moving again.

Call us at 804-548-4480 or schedule an appointment online today.