Clearing Error Code 223 on Your Lennox® Furnace

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

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

Depend on the Experts at Service Experts Heating & Air Conditioning to take care of mending this furnace error. Our NATE-certified technicians are among the best 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 Calgary with a 100% Satisfaction Guarantee* for a year.

How a Low Pressure Switch Works

Pressure switches are a necessary part of the heating process.

Here’s how your furnace acts 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 pulls in new gas and air so the burners can ignite.
  • When the pressure switch senses that sufficient air is being pulled 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 allow it to run at multiple speeds—and use energy more efficiently.

What Happens When a Low Pressure Switch Fails

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 let you know 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 price to fix your furnace depends on the issue it has and how long it takes to repair it.

Here are expected 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 require furnace service, you can lean on the professionals at Service Experts Heating & Air Conditioning to take care of the fault code and get your heat flowing again.

Call us at 403-279-5760 or schedule an appointment online today.