Resolving Error Code 223 on Your Lennox® Furnace

Feeling a chill because you’re noticing error code 223 from your Lennox® furnace?

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

Trust the Experts at D.A. Bennett Service Experts Heating & Air Conditioning to take care of repairing this furnace error. Our NATE-certified technicians are among the brightest in the industry when it comes to recognizing and repairing furnace troubles.

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

How a Low Pressure Switch Works

Pressure switches are an essential part of the heating system.

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 enough air is being brought into the burners, it closes and triggers the control board to ignite the furnace.
  • Your furnace ignites and heats your house.

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

What Happens When a Low Pressure Switch Fails

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

There could be a:

  • Blocked 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 show you there’s something wrong 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 remedy 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 D.A. Bennett Service Experts Heating & Air Conditioning

When you need furnace service, you can call on the professionals at D.A. Bennett Service Experts Heating & Air Conditioning to take care of the fault code and get your heat moving again.

Call us at 518-205-3324 or schedule an appointment online today.