Getting chilly because you’re seeing error code 223 from your Lennox® furnace?
This indicates your furnace’s low pressure switch is open. Due to the failure, your system will not function for safety reasons.
Turn to the Experts at Service Experts Heating & Air Conditioning to handle fixing this furnace error. Our ACE-certified technicians are among the elite in the industry when it comes to understanding and repairing furnace problems.
Your satisfaction is critical 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 acts after the thermostat begins to 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 fire.
- 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 permit it to run at various speeds—and use less energy.
What Happens When a Low Pressure Switch Malfunctions
The low pressure switch may be open for a couple reasons.
There could be a:
- Blocked vent
- Plugged condensate drain
- Cracked hose
There could also be trouble 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 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 the time it takes to repair it.
Here are expected 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 lean on the professionals at Service Experts Heating & Air Conditioning to take care of the fault code and get your heat moving again.
Call us at 561-629-1826 or schedule an appointment online today.