Changing Thermostat Operating Mode (Heat/Cool)

Owned by PhD Operations
Last updated: Apr 22, 2024
1 min read

 

An image of 2 thermostats (computer drawn) on top of each other. The first shows the main screen and the Mode button (second from the left on the bottom) and the second shows the Mode Change screen as well as indicators for the arrow buttons on the right and the done button (first from the left).

To change the operating mode, press the Mode Button then use the Up and Down arrow keys to select the desired mode. Select Done to set the mode.

System Modes


• OFF: System is off. No heating or cooling will come on. If system was on, it will tum
off immediately.
• HEATING: Only heating will occur.
• COOLING: Only cooling will occur.
• AUTO: Heating or cooling will come on according to the heating and cooling
setpoints. The system will automatically switch between heating and cooling modes
as needed to maintain the setpoints.


Special Heat Pump Mode: Emergency Heat


• EHEAT: An additional system mode, "EHEAT" for Emergency Heat will be displayed
if the HVAC system type is set to Heat Pump. If there is a compressor failure with the
Heat Pump system, setting the mode to EH EAT will allow the supplemental Aux heat
to come on first whenever there is a call for heating. It also disables the compressor
output to prevent further damage to the HVAC system.