Resolving Error Code 223 on Your Lennox® Furnace

Feeling a chill because you’re seeing 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 function for your protection.

Trust the Experts at Service Experts Commercial HVAC to handle mending this furnace error. Our NATE-certified technicians are among the brightest in the industry when it comes to diagnosing and repairing furnace troubles.

Your satisfaction is essential to our business. That’s why we back our furnace repair work in Toronto 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 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 brings in new gas and air so the burners can ignite.
  • When the pressure switch senses that enough air is being dragged 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 various speeds—and use less energy.

What Happens When a Low Pressure Switch Acts Up

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 let you know 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 notice 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 what’s wrong with it and the time it takes to fix 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 Service Experts Commercial HVAC

When you have to have furnace service, you can trust the professionals at Service Experts Commercial HVAC to work on the fault code and get your heat working again.

Call us at 289-201-2346 or schedule an appointment online today.