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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  
GeneralDetails
NameHoneywell RTH2510 Programmable Thermostat Owner’s Manual
MakeHoneywell
LanguageEnglish
FiletypePDF (Download)
File size0.94 MB
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Honeywell RTH2510 Programmable Thermostat Owner’s Manual
Get the free PDF manual for the Honeywell RTH2510 Programmable Thermostat Owner’s Manual and access setup steps, usage instructions, and troubleshooting tips. 👉 View online or download now to keep your thermostat running smoothly!

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.

  1. Drill 3/16-in. holes for drywall or 3/32-in. holes for plaster.
  2. Secure the wallplate with screws and anchors.
  3. Connect wires by matching labels to thermostat terminals.
  4. Install two AAA alkaline batteries on the back.
  5. Set the fan operation switch for your heating system type.
  6. 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 TypeEffect
TemporaryLasts until next programmed time period
HoldLasts 24 hours until manually changed or cancelled

Owner's Manual, p. 14

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 MessageMeaning
Lo BattBattery voltage is low
Cool OnCooling system is running; flashing means compressor protection is engaged
Heat OnHeating system is running
Setpoint indicatorThe temperature shown is the setpoint, not the current temperature
Wake/Leave/Return/SleepCurrent program period

Owner's Manual, p. 11

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

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