Fixing Error Code 223 on Your Lennox® Furnace

Getting cold because you’re noticing 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.

Trust the Experts at McKinley Heating Service Experts to take care of fixing this furnace error. Our NATE-certified technicians are among the brightest in the industry when it comes to diagnosing and repairing furnace problems.

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

How a Low Pressure Switch Works

Pressure switches are an important part of the heating system.

Here’s how your furnace acts after the thermostat initiates the call for heat:

  • Your furnace’s control board begins the draft inducer blower motor. This gets rid of combustion gases from the heat exchanger and sucks in new gas and air so the burners can start.
  • When the pressure switch senses that sufficient air is being brought into the burners, it closes and tells the control board to ignite the furnace.
  • Your furnace ignites and heats your house.

A two-stage furnace has a few pressure switches, which allow 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 variety reasons.

There could be a:

  • Obstructed 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 a problem 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 see fast flashes or an alternating slow flash as it reiterates 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 hours it takes to fix 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 McKinley Heating Service Experts

When you need furnace service, you can trust the professionals at McKinley Heating Service Experts to handle the fault code and get your heat flowing again.

Call us at 780-800-7092 or schedule an appointment online today.