Fixing Error Code 228 on Your Lennox® Furnace

Not feeling heat and seeing error code 228 from your Lennox® furnace?

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

Repairing or replacing this part is a task for the Experts at D & K Heating Service Experts in Belleville. Our NATE-certified technicians are among the elite in the industry. They’re well-qualified to work on all of your heating needs, including clearing a furnace error.

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

How a Pressure Switch Works

This part plays a critical duty as your furnace prepares to heat your space.

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

  • Your furnace’s control board commences running 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 plenty of air is being pulled into the burners, it closes and signals the control board to ignite the furnace.
  • Your furnace ignites and supplies heat.

What Happens When a Pressure Switch Fails

When your pressure switch isn’t operating the way it should, you’ll likely hear the fan start and the switch clicking multiple times before the furnace turns off completely. When a part isn’t functioning right, your furnace will turn off to protect you.

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 see short 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 D & K Heating Service Experts tech will look at other parts of your furnace first. Several other issues can also cause the error code, like a blocked vent or cracked hose.

The price to fix your furnace depends on the issue with it and how long it takes to fix it.

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

Start with the Experts at D & K Heating Service Experts

If you should have furnace repair, reach out to the technicians from D & K Heating Service Experts to diagnose the fault code and fix the issue to your standards.

Call us at 613-707-2421 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.