Clearing Error Code 229 on Your Lennox® Furnace

Seeing error code 229 on your Lennox® furnace?

This indicates your furnace is ignited at high speed because its low pressure switch didn’t close.

It’s better to let an Expert like one from Comfort Masters Service Experts in Wheeling handle repairing or replacing this part. Our technicians are ACE certified, which means they’re well-equipped to fix a furnace error like this one.

We want you to be fully content with our furnace repair in Wheeling. That’s why we back all of our work with a one-year 100% Satisfaction Guarantee.*

How a Low-Fire Pressure Switch Works

Two-stage furnaces have multiple pressure switches to let the system to run at different speeds—and work more efficiently. These switches also make sure your furnace runs safely and vents extra gases from the heat exchanger.

What Happens When a Low-Fire Pressure Switch Malfunctions

Your low pressure switch may not be operating right if your furnace inducer motor starts up in high speed and high ignition, then slows down and enters into low-fire mode about 30 seconds later.

Your furnace will communicate something’s wrong with a red flash from its indicator light, which it uses to show error codes. It has this red light to flash code, like Morse code.

You may notice fast flashes or an alternating slow flash as it tells you a fault code.

Estimated Repair Cost for Furnace Error Code 229

A blocked vent or a draft can also trigger the error, so your Comfort Masters Service Expertstechnician will check other parts of your furnace first.

The cost to fix your furnace relies on what’s wrong with it and how long it takes to remedy it.

You can expect to pay between $40 and $350 if you need a new low-fire pressure switch.

Rely on the Experts at Comfort Masters Service Experts

When you need to have your furnace repaired, reach out to the Experts at Comfort Masters Service Experts to figure out the fault code and take care of the problem.

Call us at or schedule an appointment online today.

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