Clearing Error Code 223 on Your Lennox® Furnace

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

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

Trust the Experts at Service Experts Heating & Air Conditioning to take care of repairing this furnace error. Our NATE-certified technicians are among the elite in the industry when it comes to understanding and repairing furnace issues.

Your satisfaction is critical to us. That’s why we back our furnace repair work in the Niagara Region 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 starts 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 pulls in new gas and air so the burners can fire.
  • When the pressure switch senses that enough air is being dragged into the burners, it closes and signals the control board to ignite the furnace.
  • Your furnace ignites and heats your space.

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

What Happens When a Low Pressure Switch Acts Up

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 trouble with the switch itself, the inducer or the circuit board.

Your furnace will let you know there’s a problem 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 observe 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 root problem and how long 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 Service Experts Heating & Air Conditioning

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

Call us at 289-273-2229 or schedule an appointment online today.