Lennox iComfort M30 Installation And Setup Manual page 35

Alert
Priority Condition
Code
29 Service Urgent
30 Service Urgent
Table 7. Alert Codes and Troubleshooting
Actual Displayed
Alert Text Under Component or System Operational
dealer control center State and Troubleshooting Tip
> Notifications
The thermostat is reading an indoor temperature that
is higher than 90ºF (factory default). The thermostat
will not allow any heating operation to begin until it
senses an indoor temperature lower than 90ºF. Indoor
temperature rose above 90ºF during a heating or
cooling demand.
• Heating operation is not allowed.
Over Temperature
Protection
• Check to ensure that heating equipment is not
stuck ON (reversing valve, etc.)
• Check the accuracy of the thermostat temperature
sensor.
• Select cooling system mode to cool the indoor
space below 90ºF.
The thermostat will not allow any cooling operation
to begin until it senses a temperature higher than
40ºF.
• Cooling operation is not allowed.
• Check to ensure that cooling equipment is not
Low Temperature
stuck ON.
Protection
• Check accuracy of the thermostat temperature
sensor.
• Select heating system mode to heat the indoor
space to above 40ºF.
35
How to clear
alert code
Automatically clears when
the system detects that the
issue no longer exists.
Automatically clears when
the system detects that the
issue no longer exists.