Support For TH115-AF-GB - WarmlyYours

Skip to main content

Terms & Conditions

• Free ground shipping for qualifying WarmlyYours orders placed online over $250.
• Excludes oversized items, custom items, expedited shipping, and freight shipping.
• Shipping via ground service is included via the most economical carrier option.
• Offer valid on orders shipping to the 48 contiguous states in the U.S. and 8 of Canada's provinces (not valid for Newfoundland and Labrador or Prince Edward Island).
• Cannot be combined with other offers or promotions.
• Can only be redeemed with online orders.
• Other restrictions may apply.

WarmlyYours 800-875-5285 United States Canada

Search

Filter by: All FAQ Product Blog Video Support Publication 800-875-5285 United States Canada Get Pricing For Pros Contact Us Account 0 Cart Get Pricing For Pros Contact Account 0 Cart Menu

• Floor Heating Shop Products Floor Heating Systems Heated Floor Mats Floor Heating Cables Thermostats Underlayments Accessories Third-Party Integration Tools & Resources Design Your Room Get an Instant Quote Estimate Running Costs Send us your Plan Floor Plan Finder Project Showcase Heat Loss Calculator Pets/Animals Guide Radiant Heating Guide Explore by Room Bathroom & Shower Kitchen Living Room Bedroom Basement Laundry & Mudroom Sunroom Tiny Houses Explore by Flooring Tile, Marble, or Stone Luxury Vinyl Laminate Engineered Wood Nailed Hardwood Bamboo Carpet Concrete
• Snow Melting Shop Products Snow Melting Systems Controls Accessories Tools & Resources Get an Instant Quote Running Cost Estimator Request Installation Plan Outdoor Plans Finder Project Showcase Explore by Application Driveways Walkways & Paths Outdoor Stairs Ramps Patios Explore by Surface Type Asphalt Concrete Pavers / Stone
• Deicing Roof & Gutter Deicing Roof & Gutter Systems Controls Accessories By Roof Type Metal Roofs Asphalt Shingle Roofs Slate Shingle Roofs Pipe Freeze & Heat Trace Heat Tape Systems Controls
• Towel Warmers Find Your Match Browse All Models Controls Crystal Towel Warmer Accents Shop by Finish Brushed Stainless Steel Polished Stainless Steel Matte Black Brushed Gold Polished Gold Special Offers On Sale Refurbished
• Comfort Products Infrared Radiant Heating Panels Compare Panels Ember Glass Ember Mirror Ember Flex Controls Other Comfort Must-Haves LED Mirrors Mirror Defoggers Countertop Heaters
• Resources Learn & Discover The Radiant Journal Watch Videos Join Webinars & Live Events Project Showcase Press Room Special Offers On Sale Refurbished Customer Tools Find Your Saved Quote Access Your Account Product Catalogs Request a Product Sample
• Support Get Help Product Support Training & Tutorials Register Your Warranty Services Find & Connect Find a Dealer or Installer Contact Us Hours of Operation For Pros Join the Pro Program Download Catalogs See Upcoming Tradeshows About Us Our Story Customer Testimonials Press Brand Assets

Floor Heating Shop Products Floor Heating Systems Heated Floor Mats Floor Heating Cables Thermostats Underlayments Accessories Third-Party Integration Tools & Resources Design Your Room Get an Instant Quote Estimate Running Costs Send us your Plan Floor Plan Finder Project Showcase Heat Loss Calculator Pets/Animals Guide Radiant Heating Guide Explore by Room Bathroom & Shower Kitchen Living Room Bedroom Basement Laundry & Mudroom Sunroom Tiny Houses Explore by Flooring Tile, Marble, or Stone Luxury Vinyl Laminate Engineered Wood Nailed Hardwood Bamboo Carpet Concrete Snow Melting Shop Products Snow Melting Systems Controls Accessories Tools & Resources Get an Instant Quote Running Cost Estimator Request Installation Plan Outdoor Plans Finder Project Showcase Explore by Application Driveways Walkways & Paths Outdoor Stairs Ramps Patios Explore by Surface Type Asphalt Concrete Pavers / Stone Deicing Roof & Gutter Deicing Roof & Gutter Systems Controls Accessories By Roof Type Metal Roofs Asphalt Shingle Roofs Slate Shingle Roofs Pipe Freeze & Heat Trace Heat Tape Systems Controls Towel Warmers Find Your Match Browse All Models Controls Crystal Towel Warmer Accents Shop by Finish Brushed Stainless Steel Polished Stainless Steel Matte Black Brushed Gold Polished Gold Special Offers On Sale Refurbished Comfort Products Infrared Radiant Heating Panels Compare Panels Ember Glass Ember Mirror Ember Flex Controls Other Comfort Must-Haves LED Mirrors Mirror Defoggers Countertop Heaters Resources Learn & Discover The Radiant Journal Watch Videos Join Webinars & Live Events Project Showcase Press Room Special Offers On Sale Refurbished Customer Tools Find Your Saved Quote Access Your Account Product Catalogs Request a Product Sample Support Get Help Product Support Training & Tutorials Register Your Warranty Services Find & Connect Find a Dealer or Installer Contact Us Hours of Operation For Pros Join the Pro Program Download Catalogs See Upcoming Tradeshows About Us Our Story Customer Testimonials Press Brand Assets

Contact Us Open

Loading...

Loading contact options...

Sign In

Loading...

Loading...

1. Home
2. Product Support
3. Thermostats and Power Relays
4. SmartStat™ Programmable Thermostat

Thermostat SmartStat GFCI 15mA & AF Sensor Dual (TH115-AF-GB) Part Number: TH115-AF-GBPast ModelThis support page provides publications, manuals, specifications, videos, support articles, and common support questions Need help? Call our experts at 800-875-5285 Create a new Support Request Support Questions Documents Specifications Videos Articles Similar Items

Support Questions

Showing 15 of 24 questions

What breaker and wire size do I need to use for a floor heating system?

The breaker and wire sizes are selected based on the total amperage of the WarmlyYours heating system connected to a single thermostat. This information is on the WarmlyYours heating system's installation plan, electrical plan, or UL label. Based on guidelines from the National Electrical Code: loads up to 16 Amps may utilize 12 gauge wire with a 20-Amp breaker, and loads up to 12 Amps - 14 gauge wire with a 15-Amp breaker. Local code and/or other factors may change these guidelines.

Copy 6 people found this helpful Was this helpful? Yes No

How to reset ground fault protection (GFI)?

When the ground fault protection mechanism trips, the TEST light is On (red). To reset the ground fault protection, switch the thermostat to Off and back to On. The TEST light will turn off.

Copy 3 people found this helpful Was this helpful? Yes No

Can a thermostat be placed on an exterior wall?

In theory, it is possible, if no other options are available. We do not recommend it, but If the thermostat is controlling the floor temperature with a floor sensor, then it can go on an exterior wall. It is important that the floor sensor gets located in an area of the floor not hit by sunshine.

If the thermostat will be controlling the air temperature with the built-in ambient sensor, then it should go on an interior wall.

Copy 3 people found this helpful Was this helpful? Yes No

How do I put the TH115 series thermostat in Manual mode?

Press the MOD/RET button. Manual is indicated with a hand icon, and Automatic is indicated with a clock icon.

Copy 3 people found this helpful Was this helpful? Yes No

Where to connect the ground wire of floor mats/cables?

The ground wire in the floor mat must be connected directly to the ground wire of the supply or to the house ground wire.

Copy 2 people found this helpful Was this helpful? Yes No

Why do relays fail?

Relays can fail due to excessive current or voltage. When a relay is exposed to too much current, the contacts can burn out. High voltage can also damage the coil. Other reasons include mechanical wear and tear, dust or dirt buildup, and moisture. These factors can cause the relay to malfunction or stop working entirely. Regular maintenance and using the relay within its specified limits can help prevent failures.

Copy 2 people found this helpful Was this helpful? Yes No

What does the Ground Fault Circuit Interrupter (GFCI/GFEP) do that the Circuit Breaker doesn't?

A GFCI/GFEP (Ground Fault Circuit Interrupter / Ground Fault Equipment Protection) works differently than a circuit breaker by specifically detecting a small imbalance in electrical current between the hot and neutral wires, which indicates a potential ground fault (like a person touching a live wire), and instantly shutting off the power to prevent shock, while a circuit breaker only trips when there's a significant overload in current flow on the circuit, like a short circuit or too many appliances plugged in.

Copy 2 people found this helpful Was this helpful? Yes No

Where is the factory reset on the TH115 series thermostat?

There is no factory reset of the thermostat. To effect a system reset, power it off and then back on at the circuit breaker.

Copy 2 people found this helpful Was this helpful? Yes No

Why is my TH111, TH114, TH115 or PB112 thermostat blank?

If your thermostat is blank, the first thing to do is to test to see if voltage is present at the rear of the thermostat. If no power is reaching the thermostat, please inspect the circuit breaker powering the thermostat in the breaker panel, and verify that the breaker is a non-GFCI type. If it is a GFCI breaker, replace it with a non-GFCI breaker. If there is power entering the thermostat and it is blank, it will need to be replaced.

Copy 2 people found this helpful Was this helpful? Yes No

How do I program the TH115 series thermostat to cross over midnight?

Set the COMFORT temp of the final period of the day starting at the desired time with the corresponding ECONOMY temp ending at 12:00 pm. Then on the first period of the next day, set the COMFORT temp of the first period at 00:15 am with the corresponding ECONOMY temp ending at the desired time.

Copy 1 person found this helpful Was this helpful? Yes No

I just replaced my TH115 series thermostat, wired it up, and it's not working. What's wrong?

The manufacturer reversed the wiring pattern between the LOAD side and the LINE side on newly minted controllers, verify that your wiring matches the new wiring schematic stamped on the backplate of the new controller.

Copy 1 person found this helpful Was this helpful? Yes No

Should I run my floor heating system in A (Room), F (Floor), or AF (Room/Floor) mode?

Warmly Yours recommends running the floor heating system in F (Floor) mode for most homes. This provides the most efficient operation of the floor heating system and the best protection for the floor covering material that has been installed.

Copy 1 person found this helpful Was this helpful? Yes No

Will a circuit breaker protect against a power surge?

No, a circuit breaker will NOT protect against a power surge; a circuit breakers primary function is to protect against excessive current flow (overload), while a surge protector is specifically designed to handle voltage spikes, which are what power surges are considered to be.

Copy 1 person found this helpful Was this helpful? Yes No

How do I program my TH115 series thermostat?

Warmly Yours has developed this Quick Programming Guide to simplify operation. The full capabilities can be found in the Owner's Guide, or you can view this video for a great tutorial.

Copy Was this helpful? Yes No

Why are the digits flashing on my nTrust UTN4-4999 non-programmable thermostat?

The flashing digits indicate that the actual (measured) floor temperature exceeds the thermostat temperature limit.

The temperature limit is set for either tile (104°F/40°C) or laminate (82°F/28°C) when the thermostat is first set up or re-configured.

For example: When the floor type (protection) is set to laminate, the limit defaults to 82°F/28°C. If the floor temperature goes above this - whether due to radiant floor heating or external heating sources, then the digits will flash and the heating is switched off.

Turning the temperature up or down will not affect the flashing digits. And leaving the thermostat alone with flashing digits does not harm the system.

Tip: To turn off the heated floor (ex. for months when it is not needed), on the outer edge of the thermostat, depress the lower right side button for 3-5 seconds. This will also turn it back on.

Copy Was this helpful? Yes No

At what height is the thermostat mounted?

All thermostats are mandated at 42" height for handicap accessibility, most private residences are mounted at 52-60".Please see this video on how to install a WarmlyYours nSpiration Series thermostat.

Copy Was this helpful? Yes No

Can the Relay Contactor (RC-40AMP) be controlled by a low voltage thermostat?

No, the RC-40AMP is controlled by a line voltage (120V/240V) thermostat.

Copy Was this helpful? Yes No

Floor heating system thermostat does not appear to be working, what should I do?

Turn the power (circuit breaker typically) to the thermostat off for 5 minutes and then back on to reset the thermostat.

If there is power to the thermostat and it still doesn't appear to work, then the next step toward a solution is to take Ohm measurements of the floor heating system.

This is done with a digital multi-meter that can select a low 200 Ohm (Ω) scale. To conduct this test, turn off the circuit breaker. Remove the thermostat completely from the wall and disconnect the wires connected to the LOAD connections at the back of the thermostat. Disconnect the ground wires from the house ground, and do the test shown on the links below. If you are uncomfortable doing this test, contact a qualified electrician.

Please follow one of these guides based on the type of heating system installed:

TempZone Single Conductor

TempZone Twin Conductor

For a quick overview of the testing process:

Here is a video showing how the test is done

Here is a video showing how to locate and identify the floor heating wires

If the system still does not function, contact +1 (800) 875-5285 WarmlyYours Technical Support and provide the Ohm measurements for further assistance.

Copy Was this helpful? Yes No

How do I program the same settings of the TH115 series thermostat for every day of the week?

Press and hold the DAY button for 3 seconds. All 7 days will then appear on the screen. Use the HOUR, MIN and PGM buttons to establish the desired schedule.

Copy Was this helpful? Yes No

How do I set the Display Format (°F/12 hr -or- °C/24 hr), Early Start, or Floor/Ambient settings of the TH115 series thermostat?

These are set with the configuration (dip) switches on the back of the faceplate. See the TH115 Owner's Guide for details or this article for more information.

Copy Was this helpful? Yes No

What GFCI should I choose?

Class A for all new orders, Class B if replacing a Class B unit.

Copy Was this helpful? Yes No

What is the clicking noise made by my thermostat?

That is the sound the thermostat makes when the relay is either opened or closed to turn on or off the power to the floor heating elements. See this article for further information.

Copy Was this helpful? Yes No

What is the the difference between WarmlyYours Class A and Class B GFCI ratings?

Warmly Yours controllers incorporate built-in Class A GFCI protection for all new floor heating systems.  Class A GFCI provides personnel protection and trips when ground fault current exceeds 5 mA (milliamps).  Class B GFCI protection is pretty much obsolete, but older systems may still require it.  Warmly Yours controllers with built-in Class B GFCI provide equipment and circuit protection and operates when a fault to ground exceeds 15 mA.

Copy Was this helpful? Yes No

Why does a GFCI (Ground Fault Circuit Interrupter) fail?

GFCI can fail for various reasons, such as wear and tear, moisture, corrosion, power surges, faulty wiring, or improper installation. Some of these causes can be prevented by regular inspection and maintenance, while others may require professional assistance. It is important to note that GFCI devices (ex. thermostat, breakers, outlets) should be tested regularly as these do wear out over time.

Copy Was this helpful? Yes No Show 9 More

Documents

Installation

• TH115-AF-GA-08 SmartStat Installation Manual (English, French, Spanish)
• Retro-Fit Kit Installation Guide (English)

Operation Manuals

• TH115 / PB112 Series SmartStat™ Quick Programming Guide (English)

Wiring Diagrams

• SmartStat™, EasyStat™, Comfort Regulator, Power Module Wiring Diagram with TempZone™ Twin Conductor or Environ™ (120V or 240V) (English)
• SmartStat TH115 to TempZone Flex Wiring Diagram (English)
• SmartStat™, EasyStat™ Wiring Diagram with Multiple Environ™ using a Junction Box (English)
• SmartStat™, EasyStat™, Comfort Regulator, Power Module Wiring Diagram with Environ™ 120V or 240V Flat Lead (English)
• TempZone™ Custom & Standard Mat Wiring Diagram (English)
• WIRING DIAGRAM 120V & 240V Heating Products with PB112D-GA (English)
• Wiring Diagram for TempZone™ Cut & Turn Single Conductor (Multiple rolls) 120V & 240V with SmartStat™, EasyStat™ and Comfort Regulator (English)
• Wiring Diagram for TempZone™ Cut & Turn Twin Conductor (Multiple Rolls) 120V & 240V with SmartStat™, EasyStat™, Comfort Regulator and Power Modules (English)
• Wiring Diagram for TempZone™ Cut & Turn Twin Conductor 120V & 240V with SmartStat™ and EasyStat™ (English)
• Wiring Diagram for TempZone™ Cut & Turn Twin Conductor 120V & 240V with SmartStat™, EasyStat™ and Comfort Regulator (English)

Specifications

Electrical

Connection	Double or Single pole, Line 1 & Line 2 or Hot & Neutral
Connection Method	Hardwired
Ground Fault Protection (GFCI)	Class B, 15 mA
Maximum Current	15 A
Maximum Load (Resistive Only)	1800 W - 120 V, 3600 W - 240 V, 15 A
Supply	120/240 VAC, 50/60 Hz
Voltage	120/240 VAC

Product Dimensions

Depth	2“
Installed Depth	0.75“
Length	4.875″
Weight	1 lbs
Width	2.75″

Thermostat

Has Floor Sensor

Y

Identifiers

SKU	TH115-AF-GB

Warranty / Certifications

Warranty

Limited 3-year warranty and lifetime technical support

Videos

• 10:43 How to Configure and Troubleshoot a SmartStat Thermostat
• 1:42 Tech Tips: Wiring a Floor Sensor to a Thermostat
• 2:05 Tech Tips: Wiring 2 Heating Systems to a Thermostat
• 1:47 Tech Tips: Wiring Environ to a Thermostat
• 6:03 How to Program Your Smartstat Thermostat
• 2:08 How to Wire A Floor Heating Thermostat
• 2:17 Tech Tips: Troubleshooting a GFI Issue

Articles

• Can old TH115 be switched out for nSpiration Series without any alterations to the system?
• "Clicking" thermostats
• Flashing "suitcase" Icon on Smartstat
• Honeywell Floor Sensor Ohm Values
• How to test for Amperage Output- Smartstat
• Numbers flashing or counting down on Smartstat TH115 PB112. Continuously booting up.
• Red light on Thermostat lighted
• TH115 Configuration switches
• TH115 PB112 Smartstat, TH114 Easystat, Display Is Blank, No Power, No Display
• Wire alignment on back of TH115 series stats in 2017

Similar Items

Do you need support or specifications for a specific model? Identify your model below.

TH115-AF-120S

Thermostat SmartStat™ Ambient and Floor Sensor 120V Non GFCI Past Model

TH115-AF-240S

Thermostat SmartStat™ Ambient and Floor Sensor 240V Non GFCI Past Model

TH115-AF-GA-08

SmartStat 7-Day Programmable Thermostat Past Model

Speak to a radiant heating expert

Can’t find what you’re looking for? Create a Support Request