Fixing Error Code 223 on Your Lennox® Furnace
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 work for your safety.
Trust the Experts at Stallion Heating and Air Conditioning to deal with fixing this furnace error. Our ACE-certified technicians are among the brightest 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* for a year.
How a Low Pressure Switch Works
Pressure switches are an essential part of the heating process.
Here’s how your furnace works after the thermostat begins to call for heat:
- Your furnace’s control board begins the draft inducer blower motor. This exhausts combustion gases from the heat exchanger and sucks in new gas and air so the burners can start.
- When the pressure switch senses that enough air is being pulled into the burners, it closes and triggers 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 allow it to run at different speeds—and use less energy.
What Happens When a Low Pressure Switch Fails
The low pressure switch may be open for a variety reasons.
There could be a:
- Closed off 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 exhibit error codes. It has this red light to flash code, like Morse code.
You might observe 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 problem48} and the hours it takes to remedy 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 Stallion Heating and Air Conditioning
When you require furnace service, you can lean on the professionals at Stallion Heating and Air Conditioning
to take care of the fault code and get your heat moving again.
Call us at or schedule an appointment online today.
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