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Clearing Error Code 223 on Your Lennox® Furnace

Getting cold because you’re noticing error code 223 from your Lennox® furnace?

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

Trust the Experts at Abbey Air Service Experts Heating & Air Conditioning to take care of mending 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 us. That’s why we back our furnace repair work in Oakville with a 100% Satisfaction Guarantee* for a year.

How a Low Pressure Switch Works

Pressure switches are an important part of the heating process.

Here’s how your furnace starts 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 sufficient air is being dragged into the burners, it closes and triggers the control board to ignite the furnace.
  • Your furnace ignites and heats your space.

A two-stage furnace has several pressure switches, which help it to run at various speeds—and be more efficient.

What Happens When a Low Pressure Switch Acts Up

The low pressure switch may be open for several 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 tell you 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 see 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 what’s wrong with it and the hours it takes to repair 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 Abbey Air Service Experts Heating & Air Conditioning

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

Call us at 289-813-5566 or schedule an appointment online today.