Fixing Error Code 223 on Your Lennox® Furnace

Getting chilly because you’re noticing 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 work for safety reasons.

Turn to the Experts at Rolf Griffin Service Experts Heating & Air Conditioning to deal with mending this furnace error. Our NATE-certified technicians are among the brightest in the industry when it comes to recognizing and repairing furnace troubles.

Your satisfaction is critical to our team. That’s why we back our furnace repair work 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 starts 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 ignite.
  • When the pressure switch senses that sufficient air is being pulled into the burners, it closes and tells the control board to ignite the furnace.
  • Your furnace ignites and heats your home.

A two-stage furnace has several pressure switches, which allow it to run at multiple speeds—and use energy more efficiently.

What Happens When a Low Pressure Switch Malfunctions

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

There could be a:

  • Blocked 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 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 see fast flashes or an alternating slow flash as it repeats 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 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 Rolf Griffin Service Experts Heating & Air Conditioning

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

Call us at 260-557-1275 or schedule an appointment online today.