Clearing Error Code 229 on Your Lennox® Furnace

Noticing error code 229 on your Lennox® furnace?

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

It’s important to let a pro like one from Service Experts Heating, Air Conditioning & Plumbing in the U.S. work on repairing or replacing this part. Our technicians are ACE certified, which means they’re well-prepared to fix a furnace error like this one.

We want you to be absolutely happy with our furnace repair in the U.S.. 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 various pressure switches to help the system to run at different speeds—and use less energy. These switches also ensure 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 functioning properly if your furnace inducer motor starts up in high speed and high ignition, then loses speed and changes into low-fire mode about 30 seconds afterward.

Your furnace will demonstrate something’s not right 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 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 generate the error, so your Service Experts Heating, Air Conditioning & Plumbingprofessional will investigate other parts of your furnace first.

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

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

Rely on the Experts at Service Experts Heating, Air Conditioning & Plumbing

When you need to have your furnace mended, contact the Experts at Service Experts Heating, Air Conditioning & Plumbing to work out the fault code and take care of the situation.

Call us at or schedule an appointment online today.

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