Honeywell RTH2510 Programmable Thermostat Owner’s Manual
RTH2510/
Programmable
Thermostat
RTH2410 Series
Owner’s Manual
Set
Hold
Run
Read and save these
instructions.
Fan
Auto On
Cool
Heat Off
For help please visit
honeywellhome.com
Identify System Type
This thermostat is compatible with the following systems:
•
•
•
•
•
•
•
Gas, oil or electric furnace
Central air conditioner
Hot water system with or without pump
Millivolt system
Central heating and cooling system
Heat pump without auxiliary/backup heat
Heat pump with auxiliary/backup heat
| General | Details |
|---|---|
| Name | Honeywell RTH2510 Programmable Thermostat Owner’s Manual |
| Make | Honeywell |
| Language | English |
| Filetype | PDF (Download) |
| File size | 0.94 MB |

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Honeywell RTH2510 Manual: Questions and Answers
How do I install the Honeywell RTH2510 on the wall?
Mount the wallplate using the included screws and anchors.
- Drill 3/16-in. holes for drywall or 3/32-in. holes for plaster.
- Secure the wallplate with screws and anchors.
- Connect wires by matching labels to thermostat terminals.
- Install two AAA alkaline batteries on the back.
- Set the fan operation switch for your heating system type.
- Press the thermostat onto the wallplate. Owner's Manual, p. 5
Where do I install the batteries?
On the back of the thermostat. Insert two AAA alkaline batteries. Owner's Manual, p. 7
What is the difference between Temporary and Hold overrides on the Honeywell RTH2510?
Temporary maintains a new temperature until the next scheduled period begins. Hold disables the program and maintains your set temperature 24 hours daily until you change it.
| Override Type | Effect |
|---|---|
| Temporary | Lasts until next programmed time period |
| Hold | Lasts 24 hours until manually changed or cancelled |
How long does the Lo Batt warning display on the Honeywell RTH2510 before batteries die?
Lo Batt appears for 60 days before the batteries are fully depleted. Owner's Manual, p. 16
What do the display icons mean on the Honeywell RTH2510?
| Icon or Message | Meaning |
|---|---|
| Lo Batt | Battery voltage is low |
| Cool On | Cooling system is running; flashing means compressor protection is engaged |
| Heat On | Heating system is running |
| Setpoint indicator | The temperature shown is the setpoint, not the current temperature |
| Wake/Leave/Return/Sleep | Current program period |
What temperature range should I set for cooling on the Honeywell RTH2510?
50° to 99°F (10° to 37°C). Owner's Manual, p. 17















































