What does the flashing or flickering flame mean?

The flashing or flickering flame indicates that the thermostat is calling for heat. Only on two stage thermostats, if you have a number 2 or two flames then the system is looking to turn on a second stage of heating to help the first stage. This would be due to the fact that the system is calling for more than three degrees or the first stage hasn't been able to raise the temperature by itself.

What does the flashing snowflake mean?

The flashing snowflake indicates that the thermostat is calling for cooling. Only on two stage thermostats, if you have a number 2 or two snowflakes then the system is looking to turn on a second stage of cooling to help the first stage. This would be due to the fact that the system is calling for more than three degrees or the first stage hasn't been able to lower the temperature by itself.

How do I use the high and low setpoints?

The high and low limits do not work when auto changeover is used, only in a standard heat or cool mode. The high limit is the highest the heat set temperature may be set to and the low limit is the lowest the air conditioning may be set to.

How can I change or turn off the filter monitor?

Press the UP and DOWN arrows simultaneously for 3 seconds and release. Press and release the FLAME/SNOWFLAKE button until you see CHECK. The filter monitor is adjustable from 0-9900 hours in 100 hour increments with the arrows. When finished press the START/STOP SCHEDULE button to exit.

How do I set the differentials?

Press the up and down arrows simultaneously for 3 seconds and release. Press the flame/snowflake button to scroll through the settings to dIFF. It is adjustable from .5-3 degrees in .5 degree increments. Press the flame/snowflake button and you will see dIF2 for the second stage differential. It is adjustable from 1-6 degrees in .5 degree increments. Press the flame/snowflake button and you will see dLy2 for the second stage delay. It is adjustable from 5-40 minutes in 5 minute increments. Press the start/stop schedule button to exit the setup.

What does "EER" mean?

EER stands for Energy Efficient Recovery if your thermostat can control up to 2 stages of heating and cooling.  In the program mode, EER looks ahead up to two hours before the end of the current set-back or setup temperature period and decides if it is necessary to activate the first stage of heating or cooling to meet the next temperature set point.  EER is designed to activate only the most economical stage of heating or cooling up to 30 minutes before the next temperature change when it decides if an auxillary stage is needed to help meet that temperature.

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