Honeywell PRO 4000 Series User Manual

PRO
4000 Series
Programmable
Digital
Thermostat
User Guide
Read and save these instructions.
Your new thermostat is pre-programmed. Just set the time and day. For help
please visit yourhome.honeywell.com
Press to set desired temperature.
NOTE: Set SYSTEM switch to the system you want
to control (Heat or Cool).
Fan Switch is used to
control your fan.
Auto: Fan runs only when
heating or cooling system
is on.
On: Fan runs continuously.
System switch is used to control your heating
or cooling system.
Cool: Cooling system control.
Off: All systems off.
Heat: Heating system control.
Em Heat: Emergency & Auxiliary Heat control.
Compressor is locked out. (Select models only.)
Set: Sets time/day/schedule.
Hold:
Overrides programmed temperature.
Run: Resumes program schedule.
Thermostat controls

Honeywell PRO 4000 Series Specifications

General

Display	Digital
Backlit	Yes
Hold Feature	Yes
Filter Change Alert	Yes
Changeover	Manual
Terminal Designations	R, W, Y, G
Compatibility	Standard heating and cooling systems

Summary

Thermostat Controls

Fan Control

Controls fan operation, allowing it to run only with heating/cooling or continuously.

System Selection

Selects heating, cooling, or off mode for the HVAC system. Includes Em Heat option.

Programming Schedules

Adjusting Program Schedules

Step-by-step guide to setting custom times and temperatures for weekday and weekend schedules.

Schedule Overrides

Temporary Override

Permanent Override (Hold)

Permanently holds a set temperature, disabling the program schedule until canceled.

Advanced Features

Adaptive Intelligent Recovery

Compressor Protection

Prevents compressor damage by enforcing a wait period before restarting after shutdown.

Troubleshooting

Display Issues

System Response Problems

Flashing Indicators