Resolving Error Code 223 on Your Lennox® Furnace

Feeling a chill 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 your safety.

Turn to the Experts at Atmostemp Service Experts Heating & Air Conditioning to handle mending this furnace error. Our NATE-certified technicians are among the brightest in the industry when it comes to recognizing and repairing furnace issues.

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

How a Low Pressure Switch Works

Pressure switches are a necessary part of the heating operation.

Here’s how your furnace works after the thermostat begins 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 start.
  • When the pressure switch senses that enough air is being brought into the burners, it closes and signals the control board to ignite the furnace.
  • Your furnace ignites and heats your home.

A two-stage furnace has several pressure switches, which permit it to run at different 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:

  • Closed off vent
  • Stopped condensate drain
  • Cracked hose

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

Your furnace will let you know 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 notice fast flashes or an alternating slow flash as it repeats 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 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 Atmostemp Service Experts Heating & Air Conditioning

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

Call us at 856-310-4824 or schedule an appointment online today.