Fixing Error Code 223 on Your Lennox® Furnace

Getting cold 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 failure, your system will not run for safety reasons.

Trust the Experts at Service Experts Heating & Air Conditioning to handle repairing this furnace error. Our NATE-certified technicians are among the elite in the industry when it comes to diagnosing and repairing furnace issues.

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

How a Low Pressure Switch Works

Pressure switches are a necessary part of the heating operation.

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 brings in new gas and air so the burners can fire.
  • When the pressure switch senses that enough air is being dragged into the burners, it closes and signals the control board to ignite the furnace.
  • Your furnace ignites and heats your home.

A two-stage furnace has a few pressure switches, which permit it to run at different speeds—and use less energy.

What Happens When a Low Pressure Switch Acts Up

The low pressure switch may be open for a couple reasons.

There could be a:

  • Blocked vent
  • Clogged 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 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 cost to fix your furnace depends on the issue it has and the time it takes to fix it.

Here are average 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 have to have 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 407-329-7661 or schedule an appointment online today.