Lennox Furnace Error Code 270 Solved in the U.S.

Getting cold because you’re getting error code 270 from your Lennox® furnace?

This means your furnace ignitor can’t turn on the flame. After five failed tries, the furnace will stop trying to ignite. It will then go into Watchguard mode for about an hour for safety reasons.

When your ignitor isn’t working, it’s best to rely on our ACE-certified technicians. They’ve gone through rigorous training, so you can rest easy knowing they’ll determine what’s causing the furnace error and will fix it to your satisfaction.

We believe in the quality of our furnace repair* for a year.

How a Furnace Ignitor Works

This part ignites natural gas, which helps heat your home.

Here’s how a furnace ignitor works:

  • Thermostat begins call for heat.
  • Furnace ignitor and blower become energized.
  • Ignitor warms to as hot as 2,500 degrees Fahrenheit and ignites burner gas.

A furnace ignitor should last about three to five years before it cracks and needs to be replaced. It can wear out sooner if you don’t replace your air filter regularly, since a dirty one can cause your furnace to short cycle.

What Happens When a Furnace Ignitor Fails

Your furnace will tell you there’s a problem with a red flash from its indicator light, which it uses to communicate error codes. It has this red light to flash code, much like Morse code.

You might see fast flashes or an alternating slow flash as it shares a fault code.

Estimated Repair Cost for Furnace Error Code 270

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

Before your technician replaces your ignitor, he or she will check:

  • Gas flow
  • Flame sensor current
  • Air filter

Your technician will also make sure the ignitor is actually lighting the burner and that there are no blockages or cracked hoses within your system.

An ignitor often fails when you need it most, resulting in an after-hours trip charge.

Here’s the average costs to replace it:

  • $200 during normal service hours
  • $300 to $400 after hours

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

When you need Expert furnace repair, you can rely on our highly trained technicians at Service Experts Heating, Air Conditioning & Plumbing. We’ll repair your furnace and quickly get your heat running again.

Call us at or schedule an appointment online today.

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