Siemens REV24 – User Guide & Manual
The Siemens REV24 thermostat user manual provides complete guidance for setup, programming, and daily operation of your heating and cooling system. Learn how to configure temperature settings, create schedules, troubleshoot common issues, and maximize energy efficiency with this easy-to-follow guide. Perfect for residential and commercial HVAC applications.
Siemens REV24 — Troubleshooting
Thermostat not turning on
Possible cause:
No power or faulty wiring
Solution: Verify 24V AC supply and wiring connections
Display is blank or unresponsive
Possible cause:
Battery depletion or power interruption
Solution: Replace batteries and ensure stable 24V AC supply
AC does not start
Possible cause:
Incorrect Y terminal connection or low voltage
Solution: Check Y wire and verify voltage to AC unit
Heater not engaging
Possible cause:
Incorrect W terminal wiring or system configuration
Solution: Verify W wire and system settings
Fan runs continuously
Possible cause:
Fan mode set to ON instead of AUTO
Solution: Set fan mode to AUTO in thermostat menu
Frequently Asked Questions
Why does my AC fan keep running? +
If the fan mode is set to ON, it will run continuously. Change the fan setting to AUTO to cycle with the system.
How do I reset the thermostat? +
Press and hold the Mode and + buttons simultaneously until the display resets to default settings.
The screen is blank. What should I check? +
Check that the thermostat has power. Verify the 24V AC supply and any backup batteries are correctly installed.
Does this thermostat control both heating and cooling? +
Yes, the Siemens REV24 supports both furnace heating and AC cooling systems when properly wired.
What type of batteries does it use? +
It uses 2 AA alkaline batteries for backup in case of power interruption.
Can I program schedules on this thermostat? +
No, the Siemens REV24 is non-programmable. Temperature settings must be adjusted manually.
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