Lennox furnace error code e311

Lennox furnaces are the most popular in the United States, and when they malfunction, it is important to know how to troubleshoot them.

The Lennox furnace error code e311 indicates that a wire was shorted within the blower. The first thing a technician needs to do after identifying this problem is to find out which wire was shorted. A common wire to be shorted would be T2P11 on an E-series furnace or D5Z1 on an X-series furnace. Finding this wire and disconnecting it from the plug should resolve this issue.

The Lennox E311 error code means a short circuit in one of the wires in your air blower tube assembly. To fix this problem, find out which wire is causing the problem by the disconnect.

Lennox has produced a list of error codes for their furnace and the specific troubleshooting steps for each.

Error Code E311: This error code means low oil pressure in the heat exchanger.

Lennox furnaces are made for high efficiency, which is why they are more expensive. The error code e311 occurs when the furnace has a problem in the ignition module. This fault can be fixed by turning off the power to the furnace and then turning it back on again.