Lennox furnace error code 311

Lennox furnace error code 311 is a specific error code for the Lennox system that tells the user there was a power outage.

A customer’s Lennox furnace is showing an error code of 311. This can occur when the power goes out while it is still running or they are heating or cooling with the system. A customer can call their Lennox office to get help at 604 704 0300

If a home has a Lennox furnace, it should be able to provide homeowners with the exact error code 311 that the unit is experiencing. This article is here to help out those who don’t know how to find the 311 error code or want to learn more about it.

If you are reading this, chances are your Lennox furnace isn’t functioning properly, and you’re trying to figure out what’s wrong.

While many factors can cause an error code 311, the most common one is a clogged burner inlet or vent hood filter.

The Lennox furnace error code 311 comes from the legacy lennoxtm system. This older and outdated system still exists in some homes today.

The Lennox furnace error code 311 is typically caused by a switch to an older model of the furnace and a faulty thermostat. The only way to fix this error is by replacing both the old switch and thermostat with a new one from Lennox or another company that makes compatible parts.