Getting chilly because you’re noticing 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 Falso Service Experts to deal with fixing 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 operation.
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 brings 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 tells the control board to ignite the furnace.
- Your furnace ignites and heats your house.
A two-stage furnace has several pressure switches, which help it to run at different speeds—and be more efficient.
What Happens When a Low Pressure Switch Acts Up
The low pressure switch may be open for a variety reasons.
There could be a:
- Obstructed vent
- Plugged condensate drain
- Cracked hose
There could also be trouble with the switch itself, the inducer or the circuit board.
Your furnace will show you 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 repeats a fault code.
Estimated Repair Cost for Furnace Error Code 223
The expense to fix your furnace depends on the root problem and the time it takes to fix 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 Falso Service Experts
When you have to have furnace service, you can call on the professionals at Falso Service Experts to handle the fault code and get your heat moving again.
Call us at 315-313-6531 or schedule an appointment online today.