Resolving Error Code 223 on Your Lennox® Furnace

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

This means your furnace’s low pressure switch is open. Due to the failure, your system will not function 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 brightest in the industry when it comes to understanding and repairing furnace troubles.

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

How a Low Pressure Switch Works

Pressure switches are a necessary part of the heating system.

Here’s how your furnace works after the thermostat initiates the call for heat:

  • Your furnace’s control board begins the draft inducer blower motor. This exhausts combustion gases from the heat exchanger and sucks in new gas and air so the burners can fire.
  • When the pressure switch senses that a suitable amount of air is being dragged into the burners, it closes and triggers the control board to ignite the furnace.
  • Your furnace ignites and heats your house.

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

What Happens When a Low Pressure Switch Fails

The low pressure switch may be open for several reasons.

There could be a:

  • Obstructed 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 a problem with a red flash from its indicator light, which it uses to feature 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 expense to fix your furnace depends on the root problem and the hours it takes to fix 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 Service Experts Heating & Air Conditioning

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

Call us at 613-817-1591 or schedule an appointment online today.