Lennox furnace error code RTU

Lennox furnaces are highly sophisticated devices to help heat homes; in particular, this is the case for those who want to avoid using fossil fuels. However, sometimes these furnaces experience errors that can be frustrating and potentially dangerous for lives.

This blog post will cover common troubleshooting problems on a Lennox furnace, such as code RTU.

We wanted to share some solutions and give a step-by-step process for how you may fix the problem on your own or contact an HVAC professional for help.

Lennox furnaces are among the most expensive items on the homeowner’s repair list. If your furnace comes back with an error code RTU, don’t panic. These codes can range from 4000 to 8400, but there is a way to fix them.

This is an error code that comes from the Lennox furnace. It is a common issue that residents of homes with this type of furnace may face.

There are many reasons why this code could occur, including:

– The filter has been blocked and needs to be cleaned

– The thermostat is not set properly

– The fan motor has failed and needs to be replaced

– There’s a misfire in the ignition system

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