Lennox diplomat furnace error codes

The Lennox Diplomat gas furnaces have been manufactured in the USA since 1984. In addition to the Diplomat, the company manufactures other makes, such as White-Rodgers gas furnace models.

Lennox Diplomat furnaces are simple to operate. However, it might be difficult for a newbie to distinguish between an error code and a regular display message on the front control panel. So let’s take a look at Lennox Diplomat furnace error codes and what they mean:

Check Gas Valve Circuit – This means an issue with the electrical circuit powering your gas valve.

Intermittent Igniter – This means an issue with your igniter that will need to be replaced or repaired soon if it continues.

Lennox is one of the leading brands in HVAC systems. Their product is well-known for its reliability and efficiency.

Lennox has a series of error codes displayed on your thermostat if the furnace has an issue. This article will review each code, its meaning, and how to fix it!

1) F1: Fan running at high speed but not turning on the heat

A problem with the fan will cause this unit to constantly rotate at high speeds and refuse to turn on any heaters. The problem can be fixed by replacing a broken control board or wire connections coming from the fan.

2) F2: Blower isn’t running

Blower problems can happen when dirt gets lodged in blower blades or a belt