Fixing Error Code 228 on Your Lennox® Furnace

Not getting heat and noticing error code 228 from your Lennox® furnace?

This means your HVAC equipment couldn’t regulate its pressure switch before turning on. As a result, your system will not run for your safety.

Repairing or replacing this part is best left to the professionals at Gordon's Service Experts Heating & Air Conditioning in Oklahoma City. Our NATE-certified technicians are among the brightest in the industry. They’re well-prepared to take care of all of your heating needs, including fixing a furnace error.

We want you to be absolutely satisfied with our quality furnace repair in Oklahoma City. That’s why we back it with a 100% Satisfaction Guarantee* for a year.

How a Pressure Switch Works

This part plays a critical part as your furnace prepares to warm your home.

Here’s what occurs after your thermostat’s call for heat:

  • Your furnace’s control board starts running the draft inducer blower motor. This drains combustion gases from the heat exchanger and pulls in new gas and air so the burners can fire.
  • When the pressure switch senses that sufficient air is being pulled into the burners, it closes and commands the control board to ignite the furnace.
  • Your furnace ignites and provides heat.

What Happens When a Pressure Switch Fails

When your pressure switch isn’t working the way it should, you’ll likely hear the fan run and the switch clicking multiple times before the furnace shuts down completely. When a part isn’t working right, your furnace will turn off as a safety precaution.

Your furnace will tell you something is incorrect with a red flash from its indicator light, which it uses to exhibit error codes. It uses this red light to flash code, like Morse code.

You may note fast flashes or an alternating slow flash as it passes on a fault code.

Estimated Repair Cost for Furnace Error Code 228

Before replacing the switch, your Gordon's Service Experts Heating & Air Conditioning technician will look at other parts of your furnace first. Some other issues can also generate the error code, like a congested vent or cracked hose.

The price to fix your furnace depends on what’s wrong with it and how long it takes to fix it.

If your pressure switch needs to be replaced, you can anticipate to pay between $40 to $350.

Trust the Experts at Gordon's Service Experts Heating & Air Conditioning

If you should have furnace repair, turn to the pros from Gordon's Service Experts Heating & Air Conditioning to diagnose the fault code and fix the situation to your standards.

Call us at 405-432-2197 or schedule an appointment online today.


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At Service Experts, our top priority is always the health and safety of our customers and team. We are following all COVID-19 (Coronavirus) public safety guidelines and adjusting our business practices as needed to ensure customer and employee wellbeing. As a precautionary measure, anyone working on behalf of Service Experts – including our technicians – is being asked to stay home for the recommended 14 day quarantine period if they are returning from out-of-country, have been exposed to a presumptive or confirmed case, or are feeling unwell. We are providing our technicians and other field employees with additional health and safety guidance to assist in keeping our customers and employees safe. Please be prepared to answer brief health and safety questions with our representative. We will continue to monitor the situation and will adjust our business practices as required. We recognize that this may be a particularly stressful time and want you to know that, we are committed to serving you and making your experience as easy as possible.