Robertshaw® 9801i2 Humidity and Temperature Digital Programmable Thermostat

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What's special about this programmable digital thermostat?

  • Reduce your work by 50% with one device that controls both the humidity and temperature in your environment - no more condensation on the windows
  • Especially useful in an office environment, you can enter your own PIN code to guard against any changes to the program menu, temperature or set up functions
  • Excellent for HVAC contractors who want to program the units with service call information before they ship them out (i.e. Call Joe's HVAC for service)
  • Especially helpful set-up wizard makes the installation and initial set up of your device easy and lets you review a full day of programming on one screen
  • Click for More Features
Eneryg Star




RS-9801i2 Robertshaw® 9801i2 5/2 Deluxe Humidity and Temperature Programmable Thermostat 6.75"W x 4.372"H x 1.625"D 0.6 lb DISCONTINUED

This is truly an easy to install and set up electronic thermostat. The display walks you through each step without complication. In addition, the Robertshaw® 9801i2 digital thermostat makes controlling your ambient humidity and temperature a snap.

In addition to being a functional and programmable thermostat and humidity regulator, this control has a sleek and attractive design that will delight customers with its aesthetic benefits as well. You will love it as a contractor because you can pre-program it with up to 5 service call reminders, which your customer will receive on a timely basis.

  • Automatically adjusts for Daylight Saving time, so you don't have to re-program twice a year
  • Save the planet one location at a time with this green EnergyStar® rated product, which has a five year limited warranty for peace of mind
  • Choice of English, Spanish or French for the display options
  • Your programs are saved into the programmable memory, so they are secure even in the event of a power loss
  • Adjustable backlighting allows you to set the lighting of your display for maximum visual clarity even at night
  • Allows for temporary override of settings anywhere from 10 minutes to 365 days for brief periods or extended vacations
  • Easy to review your settings with the ability to view your full day programming
  • Automatically changes will change from heat to cooling cycle so that you are always comfortable
  • Even when you are neither cooling nor heating, the intermittent fan keeps air circulating and filtrating with very low power usage


Electrical Rating 24 Volt AC (18-30 VAC)
1 amp maximum load per terminal (relay outputs)
3 amp total maximum load (all terminations combined)
Temperature Control Range 45°F - 90°F (7°C - 32 °C)
Accuracy +/- 1°F (+/- 0.5°C)
Power Source 24 VAC
Staging/ Application 1 Heat / 1 Cool
System Configuration Single-stage gas, oil or electric heating/cooling systems and single stage heat pump
Terminations OS, IS, C, G, Y1, B, E/W1, O, R, L, H, D
Auto Changeover Deadband Selectable from 2° to 8° F
Temporary Temperature Override From 10 minutes to 365 days
Remote Sensor Capable 1 indoor and 1 outdoor sensor
Comments Multi-stage gas, electric, oil, heat pump and millivolt systems
Dimensions 6.75"W x 4.372"H x 1.625"D
Weight 12.8 oz
Standard ISO 9001 Company
Patent Information This product is covered by one or more of the following U.S. patents. Foreign patent rights may be pending. 4967382, 5803357, 6502758, 7000849, D301207, D462940


Comparison Chart

Menu Driven (Ease of Programming) x . .
Installation Wizard x . .
Displays Complete Program x . .
Adjustable Backlighting x . .
Cooling System Monitor x . .
Heating System Monitor x . .
Multi-Language; capable of up to 3 languages x . .
1/2 Degree Resolution x . .
Time of Day Zoning x . .
LED Status Indicators x . .
Integrated Fossil Fuel Kit Converter for x . .
Heat Pump Application x . .
Events per Day: 2, 4, 6 x . .
5/2 Program x . .
24 Hour Program x . .
5/1/1 Program x . .
Dehumidification x . .
Intermittent Fan x . .
Customizable Contractor ID x . .
Remote Outdoor Sensor x . .
Remote Indoor Sensor x x .
Adjustable Residual Cooling x x .
12 or 24 Hour x x .
Humidifier Pad Monitor x x .
UV Light Monitor x x .
Humidification x . x
7-Day Programming x x x
Stages: 1H/1C x x x
Large Display x x x
Adjustable Timed Override x x x
Adjustable Timed Hold x x x
Automatic Daylight Saving Time Adjustment x x x
Adjustable Temperature Limits x x x
High/Low Balance Points x x x
Adjustable Differential x x x
Adjustable Compressor Short Cycle Protection x x x
Battery Free Memory Retention x x x
Manual Override x x x
Resume x x x
Auto Changeover x x x
Gas/Electric x x x
Single Stage Heat Pump Compatible x x x
Line Powered x x x
Programmable Fan x x x
°F and °C x x x
Air Filter Monitor x x x
Vacation Setting x x x
O & B Terminals x x x
4 Hour Reserve x x x
Energy Efficient Recovery x x x
Pre-set Program x x x
Hidden Service Level x x x
Security Key Pad x x x
Temperature Recalibration x x x


Reference Chart

Model Program Application Staging Power Terminations
    Electric Gas Oil Heat Pump Millivolt Heat Cool    
9801i2 7 DayPLUS** x x x x - 1 1 24V AC E/W1, Y1, C, R, G, H, D, O, B, L, IS, OS
View page
5-2 Day x x x x x 1 1 24V AC or battery operated RH/R, RC, C, G, B, O, Y1, W1
view page
5-2 Day x x x x - 2 2 24V AC or battery operated RH/R, RC, C, G, B, O, Y1, W1, Y2, W2, E, L


Model Functions & Features
  Auto Changeover Memory Reserve Adjustable Differential Energy Efficient Recovery Back Lighting Remote Sensor Indoor Sensor Outdoor Sensor Programmable Fan Energy Star Keypad Lockout Filter Monitor Vacation Hold Special Features
9801i2 x EEPROM x selectable x 1 indoor/1 outdoor 9020i 9025i x x x x x Humidification
View page
x EEPROM x - x - - - x x x x x -
view page
x EEPROM x x x - - - x x x x x -





Additional Information from EPA -



EnergyStar® Energy Star

Environmental Protection Agency (EPA) EPA

U.S. Department of Energy (DOE) Department of Energy






Q:Intermittent fan

When you are in the cooling or heating mode, can you set the intermittent fan to periodically automatically cycle on to circulate the air in the house in between between temp driven cooling and heating cycles.

Asked by Anonymous user on


  • - Thank you for your question. This product does not allow for that kind of control over the fan.

    Fernando M. on

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