Getting chilly because you’re seeing error code 223 from your Lennox® furnace?
This means your furnace’s low pressure switch is open. Due to the issue, your system will not run for your protection.
Trust the Experts at Comfortech Service Experts to handle mending this furnace error. Our NATE-certified technicians are among the brightest in the industry when it comes to diagnosing and repairing furnace issues.
Your satisfaction is critical to our business. That’s why we back our furnace repair work in Jackson with a 100% Satisfaction Guarantee* for a year.
How a Low Pressure Switch Works
Pressure switches are an essential part of the heating system.
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 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 enough air is being brought 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 help it to run at different speeds—and be more efficient.
What Happens When a Low Pressure Switch Malfunctions
The low pressure switch may be open for several reasons.
There could be a:
- Obstructed vent
- Plugged condensate drain
- Cracked hose
There could also be an issue 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 notice fast flashes or an alternating slow flash as it replays 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 how long 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 Comfortech Service Experts
When you have to have furnace service, you can lean on the professionals at Comfortech Service Experts to take care of the fault code and get your heat flowing again.
Call us at 601-852-3105 or schedule an appointment online today.