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 issue, your system will not run for your safety.
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 critical to us. That’s why we back our furnace repair work in North America 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 gets rid of combustion gases from the heat exchanger and sucks in new gas and air so the burners can start.
- 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 more than one pressure switches, which allow it to run at multiple speeds—and use less energy.
What Happens When a Low Pressure Switch Malfunctions
The low pressure switch may be open for a variety 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 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 see fast flashes or an alternating slow flash as it replays a fault code.
Estimated Repair Cost for Furnace Error Code 223
The cost to fix your furnace depends on the root problem 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 Service Experts Heating & Air Conditioning
When you need furnace service, you can call 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 866-397-3787 or schedule an appointment online today.