Honeywell T4 PRO Thermostat

Honeywell’s T4 PRO digital thermostat is the ideal combination of performance, energy savings and features. With a large backlit screen, the T4 PRO helps you manage both heating and cooling from your device.  Designed to streamline everything from installation to user experience, the T4 features push button control and seven-day scheduling, including an option to set a different schedule on weekends. With its adaptive intelligent recovery, the T4 helps you feel comfortable sooner by learning how long it takes your system to reach a desired temperature and activating the system earlier.

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Simplified Control

This thermostat is extremely easy to use with simple push button controls, allowing you to adjust the temperature or set a heating and cooling schedule. 

Learns Your Schedule

Take the stress off of yourself. The T4 Pro Programmable Thermostat learns how long it takes your system to reach the temperature you want. It turns on the heating or cooling system earlier to make sure you’re comfortable at the time you expect.


Revolves Around You

Program a seven-day schedule or set different schedules on the weekend so you can always be comfortable whether you’re awake or asleep, home or away. It’s that easy!


A convenient one touch LCD screen. This will make adjusting the temperature a breeze.


5 Year Warranty

For peace of mind.


The Tech was prompt, friendly and professional. I recommend Washington Energy Services.”
Sandy G.
Bellevue, WA
They stayed about 10 or 11 hrs until the job was done. No extra charge! The areas were always kept clean and organized.”
Tamara T.
Bothell, WA
  • Full specifications

    Manual/ Digital




    Power method

    Power Stealing / Battery

    Use with Gas/Oil


    Use with electric furnace


    Use of heat pump


    Stages of heat


    Stages of cool


    Programming Days


    Resume/adaptive intelligent recovery capability


    Backlit display


    Auto changeover


    Memory back-up


    Remote accessible




    Limited warranty

    5 Years

All for home.

Award-winning service and installation.

Since 1957, homeowners have come to know us for the type of best-in-class service they deserve. Frequent winners of the Angie’s List Super Service Award and perennially among the top local contractors rated by the BBB, Angie’s List and GuildQuality.

installation and technicians service home repair

A job done right

Our Home Project Advisors are ready to tailor choices to your lifestyle and budget and our installers have the experience and talent to make sure the work is done right.

Local, trusted, passionate

Since 1957 we have made homes all over the Puget Sound more efficient and comfortable. Our employees are craftsmen with a contagious enthusiasm for rolling up their sleeves and exceeding expectations.

Trained, licensed, bonded and drug tested

Each technician receives a minimum of 100 hours of on-the-job-training each year to ensure everyone is up to date on best practices. All of our employees undergo background checks and drug screens.