Fixing 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 function for your safety.

Depend on the Experts at Climate Control Service Experts to deal with fixing this furnace error. Our NATE-certified technicians are among the brightest in the industry when it comes to diagnosing and repairing furnace issues.

Your satisfaction is essential to our business. That’s why we back our furnace repair work in Mobile 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 begins to call for heat:

  • Your furnace’s control board begins the draft inducer blower motor. This pushes out combustion gases from the heat exchanger and sucks in new gas and air so the burners can fire.
  • When the pressure switch senses that sufficient air is being pulled into the burners, it closes and triggers the control board to ignite the furnace.
  • Your furnace ignites and heats your home.

A two-stage furnace has a few pressure switches, which allow 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
  • 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 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 replays a fault code.

Estimated Repair Cost for Furnace Error Code 223

The cost to fix your furnace depends on the root problem and the time 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 Climate Control Service Experts

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

Call us at 251-202-7503 or schedule an appointment online today.