Clearing Error Code 223 on Your Lennox® Furnace
Getting cold because you’re seeing 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 your protection.
Trust the Experts at Donelson Air Service Experts to handle repairing this furnace error. Our ACE-certified technicians are among the best in the industry when it comes to recognizing and repairing furnace issues.
Your satisfaction is important 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 process.
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 pushes out combustion gases from the heat exchanger and brings in new gas and air so the burners can start.
- When the pressure switch senses that sufficient air is being dragged into the burners, it closes and signals the control board to ignite the furnace.
- Your furnace ignites and heats your space.
A two-stage furnace has several pressure switches, which allow it to run at different speeds—and be more efficient.
What Happens When a Low Pressure Switch Fails
The low pressure switch may be open for several reasons.
There could be a:
- Blocked vent
- Stopped condensate drain
- Cracked hose
There could also be a problem 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 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 the root problem and how long 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 Donelson Air Service Experts
When you require furnace service, you can trust the professionals at Donelson Air Service Experts to work on the fault code and get your heat working again.
Call us at 615-953-9885 or schedule an appointment online today.