Fixing Error Code 229 on Your Lennox® Furnace

Getting error code 229 on your Lennox® furnace?

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

It’s best to let a professional like one from Service Experts Heating, Air Conditioning & Plumbing in the U.S. 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 satisfied 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 multiple pressure switches to allow the system to run at different speeds—and use less energy. 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 working 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 Service Experts Heating, Air Conditioning & Plumbingprofessional will check other parts of your furnace first.

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

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

Trust the Experts at Service Experts Heating, Air Conditioning & Plumbing

When you need to have your furnace repaired, turn to the Experts at Service Experts Heating, Air Conditioning & Plumbing 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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