Lennox Furnace Error Code 270 Solved in Longmont

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

This shows you that your furnace ignitor can’t start the flame. After five failed tries, the furnace will halt trying to ignite. It will then change into Watchguard mode for about an hour for safety reasons.

When your ignitor stops working, it’s better to rely on our NATE-certified technicians. They’ve gone through important education, so you can rest easy knowing they’ll find out what’s generating the furnace error and will mend it to your contentment.

We trust in the quality of our furnace repair in Longmont so much, we back it with a 100% Satisfaction Guarantee* for a year.

How a Furnace Ignitor Works

This part ignites natural gas, which helps warm up your space.

Here’s how a furnace ignitor works:

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

A furnace ignitor should last approximately three to five years before it fractures and must be replaced. It can break down sooner if you don’t replace your air filter routinely, since a clogged one can cause your HVAC equipment to short cycle.

What Happens When a Furnace Ignitor Fails

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

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

Estimated Repair Cost for Furnace Error Code 270

The bill 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 investigate:

  • Gas flow
  • Flame sensor current
  • Air filter

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

An ignitor always seems to fail when you need it most, prompting an after-hours maintenance call.

Here’s the typical costs to replace it:

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

Turn to the Experts at Service Experts Heating & Air Conditioning

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

Call us at 303-647-5749 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.