Fixing Error Code 228 on Your Lennox® Furnace

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

This means your heating system couldn’t regulate its pressure switch before launching. As a reaction, your system will not run for safety reasons.

Repairing or replacing this part is a task for the professionals at Fras-Air/General Service Experts Heating & Air Conditioning in Hillsborough. Our NATE-certified technicians are among the elite in the industry. They’re well-prepared to work on all of your heating needs, including repairing a furnace error.

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

How a Pressure Switch Works

This part plays a prominent role as your furnace prepares to warm your space.

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

  • Your furnace’s control board starts 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 sufficient air is being pulled into the burners, it closes and signals the control board to ignite the furnace.
  • Your furnace ignites and creates heat.

What Happens When a Pressure Switch Malfunctions

When your pressure switch isn’t working correctly, 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 for your safety.

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

You may notice quick 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 Fras-Air/General Service Experts Heating & Air Conditioning tech will look at other parts of your furnace first. Some other issues can also create the error code, like a blocked vent or cracked hose.

The price to repair your furnace depends on what’s defective 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.

Trust the Experts at Fras-Air/General Service Experts Heating & Air Conditioning

If you need furnace repair, reach out to the technicians from Fras-Air/General Service Experts Heating & Air Conditioning to diagnose the fault code and fix the problem to your standards.

Call us at 908-448-2154 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.