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Resolving 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 malfunction, your system will not run for safety reasons.

Turn to the Experts at Comfort Masters Service Experts to take care of repairing this furnace error. Our ACE-certified technicians are among the elite in the industry when it comes to diagnosing and repairing furnace problems.

Your satisfaction is essential to our business. That’s why we back our furnace repair* for a year.

How a Low Pressure Switch Works

Pressure switches are an important part of the heating system.

Here’s how your furnace works 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 pulls in new gas and air so the burners can start.
  • When the pressure switch senses that a suitable amount of 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 more than one pressure switches, which permit it to run at different 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 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 reiterates a fault code.

Estimated Repair Cost for Furnace Error Code 223

The price to fix your furnace depends on the issue it has and how long it takes to remedy 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 Comfort Masters Service Experts

When you require furnace service, you can lean on the professionals at Comfort Masters Service Experts to take care of the fault code and get your heat moving again.

Call us at 847-250-6729 or schedule an appointment online today.

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