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

Trust the Experts at Abbey Air Service Experts to take care of mending this furnace error. Our NATE-certified technicians are among the best in the industry when it comes to diagnosing and repairing furnace issues.

Your satisfaction is important 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 essential part of the heating process.

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 ignite.
  • When the pressure switch senses that sufficient 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 several pressure switches, which help 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
  • Plugged 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 an issue 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 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

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

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