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SunTouch SunStat PRO Programmable Thermostat LCD

Item Number: 500670

Alternate Part Number: 500670, 500670BB, 500670SB

MFR Part No: 81009181

Availability: In stock

List Price: $175.00

Our Price: $139.00


Availability : In stock and ready to ship!

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The SunStat PRO Programmable Thermostat (500670) is a solid performer for operating your floor heating system since 2007.

This thermostat has built-in Ground Fault Protection for your safety and is fit for use in the US and Canada according to ETL to UL standards. The thermostat senses the floor temperature via a 15-foot Floor Sensor Wire which is included. In most areas, you don't even need another GFCI circuit. Enjoy the sleek design of the backlit display with the programming buttons simply hidden behind a single door.

SunStat PRO is a Dual Voltage thermostat which means it's suitable for 120v or 240v and you don't have to worry about its compatibility with your floor heating system.

Manufactured in-house by SunTouch (not outsourced like many other brands) it was introduced in 2007 (check out the newer models Pro II and VIEW):

  • 120v/240v (dual voltage) means you always have the right thermostat regardless of the system voltage on-site.
  • Air-sensing Mode with an optional floor temperature override limit.
  • Regulator mode takes over if the sensor is damaged or disconnected.
  • Master Control Capability for connecting other SunStat 500680 relays to expand your floor heating system.
  • 15' long Class 2 Insulated Sensor wire
  • 5/1/1 Day Programming settings or manual operation
  • 4 preset heating schedules or you can program your own!
  • Monitor your usage and check the on time of your SunTouch system through the SunStat Pro. Choose either 12 or 24 (Military time) hour mode for the clock display.
  • State of the art SmartStat Technology
  • Easy integration with your home automation system through dry contact relay.

Additional Features:

  • Floor Temp Range of 40 to 99 degrees F, or 5 to 37 C.
  • Fahrenheit or Celsius temperature display option.
  • View operation, heat on/off, mode and other details on a large digital display, with LCD for clock and all other functions
  • 15 amp capacity lets you control SunTouch 120VAC mats totalling up to 150 SF per control (or up to 300 SF of 240V mats).
  • Connection with remote FloorStat sub control relay (MPN: 500680).
  • Class A GFCI safety protection is built-in with a test light and button, a 5 milliAmp trip.
  • 2-Year Warranty (newer models Pro II and VIEW have 3 Year Warranty)
  • Batteries not required! Save your programming to memory, endlessly.
  • Quick switch to Economy setting when you'll be away with the Vacation Mode / Manual Setback.
  • Override your program with Manual mode; you can choose the programming version for its great looks but use all manual controls if you prefer.

Included with Every Thermostat:

  • 15' Sensor Wire
  • Complete English, Spanish, and French operation instructions
  • Screwdriver for installing
  • Mounting Screws
  • Wire Nuts
What's In The Box Programmable thermostat, sensor wire, wire nuts, screwdriver, mounting screws
Temperature Control programmable
Backlight (display) color Amber Light
Display Type LCD
Buttons buttons
Voltage 120 VAC /240 VAC
Brand Name SunTouch Floor Warming
Energy Efficient yes
Maximum Load Watts @ 120v 1800
Maximum Load Watts @ 240v 3600
Maximum Load Amps 15
Recommended Supply Circuit size 20 amp breaker
Maximum Heated SF 120V 12 W/SF 150
Maximum Heated SF 240V 12 W/SF 300
Wall Mount Style (Electrical Box reqd) Depth in box 15/16" Overall 1.75
Multi Gang with other switches? Not recommended
Weight 1.5000
Unit Width 2 7/8" (73 mm)
Unit Height 4 9/16" (115.9 mm)
Unit Depth 1 3/4" (44.5 mm)
Visible Height 4 9/16" (115.9 mm)
Visible Depth 13/16" (20.6 mm)
Visible Width 2 7/8" (73 mm)
Inside Box Width 1 11/16" (42.9 mm)
Inside Box Height 2 3/4" (69.8 mm)
Inside Box Depth 15/16" (23.8 mm)
LCD Display Size Ht 2.25
LCD Display Size Width 1.25
Manufacturer SunTouch Watts Radiant


Recent Reviews

Overall Product Rating:

(5 out of 5)

By: Theodore W

Feb 25, 2015

Ceramic tile floors without heat are a pain. Suntouch heat makes them wonderful.

Ceramic tile floors without heat are a pain. Suntouch heat makes them wonderful.

Overall Product Rating:

(4 out of 5)

By: Eddie

Dec 30, 2014

I enjoy the floor heat under the tiled floor of my old farmhouse dining room.

I ordered the thermostat as a replacement for my original one which failed due to what appeared to be a melted connection after a few years of operation. I have no idea what precipitated the failure after such a long period of usage and was happy to have the replacement hooked up and my floor heat functioning once more. I enjoy the floor heat under the tiled floor of my old farmhouse dining room in Michigan, and would add it in other areas if I ever changed floor coverings of other rooms for any reason

Overall Product Rating:

(5 out of 5)

By: J Lewis

Jun 30, 2014

A noted step up

I had to replace a 10- year-old SunTouch thermostat for a floor heating mat in our master bathroom. The unit had reached a temperature of over 100 degrees, was still increasing and had to be shut off with the controls on the back of the wall mounted unit which were difficult to locate. The new Sun Touch thermostat which replaced the failed and discontinued old model was a noted step up with improvements including a lighted control face and on-off buttons on the exterior.

The new unit was shipped on a very timely basis and was easy to install since the sensor was in working shape.

Overall Product Rating:

(4 out of 5)

By: Chuck

Mar 14, 2013

It's really great for our master bath

It is a great product but like other responses I had trouble wiring it. Finally had to call an expert. We found two places where it was wired incorrectly. All is well with the world now.