Troubleshooting

“ER1 Out” Thermostat Reading on the Display It indicates that the thermostat is not set up correctly. Click "Read More" for details.

6iE Troubleshooting 2025 Are you experiencing an error on your thermostat? Read this guide for tips on 6iE troubleshooting.

Are you getting a “Ground Fault” error after a few years? That "Ground Fault" error on your thermostat after several years could indicate your floor heating system...

Can I cut my floor heating mat if it’s too large? Instead, try pulling the cable off the mesh and spacing the cable every 2 or 2.5...

Can I Cut the Electric Floor Heating System Wire if I Have too Much? This page explains why Warmup does not recommend you cut the wire for any reason and...

Can the dual cable tester be used to measure the resistance of the floor sensor? The dual cable tester (DCT) cannot be used to measure the resistance of the floor sensor because...

Check the Resistance Readings of your Electric Floor Heating System If you purchased a Digital Multimeter from Warmup you will have 2 connectors as shown below....

Connected to the internet and getting the “!” message on 4iE Thermostat? Ensure you have created your account and registered the thermostat using the Device Number. Click "Read...

Connecting Your Foil Heating System For tips for connecting and programming your system click "Read More".

Does the TH115 Floor Heating Thermostat have GFCI Built In? Ground Fault protection is a must, especially with bathroom and other "wet" installations.  Are you covered?...

Floor Probe Installation Instructions The thermostats come with a 9’ sensor cable to detect the temperature under the floor finish....

General installation notes for the Foil Heating System "Draw an installation plan showing the placement of the mats, floor sensor, and lead wire(s) to...

Ground Fault Error: What does this Mean if my Thermostat has “Ground Fault Error” on the Display? This message will occur if a ground fault is detected. Click "Read More" for details.

Heater Error: What Does it Mean if my Thermostat Reads “Heater Error” on the Display? Heater error will occur if the heating system is not properly wired to the thermostat. Please...

How do I reset the WiFi relay on a WSM snow melting controller? Do you need to reset the WiFi on your Warmup snow melting controller? This post will...

How to Fix the ER1 Error on a 7iE Thermostat Learn what the ER1 Error means on a Warmup 7iE Thermostat and how to resolve the...

How to Fix the ER2 Error on a 7iE Thermostat Learn what the ER2 Error means on a Warmup 7iE Thermostat and how to resolve the...

How to identify and repair a broken underfloor heating cable. Learn how to repair a damaged heating mat or loose wire system with our step-by-step guide....

How to Reset your 7iE Thermostat Learn how to reset your Warmup 7iE Smart Thermostat through the thermostat's settings.

How to Resolve a Floor Sensor Error on your EZPT Thermostat Learn what causes and how to resolve a floor sensor error on your Warmup EZPT Programmable...

How to Test GFCI & Identify a Ground-Fault Error on a 7iE Thermostat Learn how to test the GFCI and identify a GFCI error on your Warmup 7iE Smart...

How to Test the GFCI on your EZPT Thermostat Learn how to test the GFCI on your Warmup EZPT Easy Programmable Thermostat.

I nicked the wire slightly; do I need a repair kit? When slight damage is caused to the wire, a visual assessment needs to be made. Read...

If I’ve Registered an Account, Why Does my 4iE Still Have an ‘!’ on the Screen? It could also mean that your thermostat is connected to the internet but you have not...

Is it normal if I hear a clicking noise from my thermostat? The clicking noises are the relay opening and closing to let the power through to the...

Once a repair has been completed, can I replace the tile right away? Upon completion of a repair it is completely safe to apply thinset and tile. Read more.

Output Fault Detected on the Display It is likely to be a wiring or installation issue. Please consult our installation manual for...

Should I use Self-leveler or Thinset ? Using self-lever or thinset depends on the type of flooring being installed and preference. 

TH115 Floor Heating Thermostat Error Message: HI What do you do when this message appears?  Click "Read More" for details.

TH115 Floor Heating Thermostat Error Message: LO What do you do when this message appears?  Click "Read More" for details.

Thermostat Reads Error Message “ER2” on the Display? The ER2 message will occur if the floor sensor has a short circuit or has a...

Un-Mounting Your Thermostat Please click "Read More" for instructions on how to un-mount your thermostat

Was your electric floor heating system installed directly on a concrete slab? Without a thermal break, the concrete acts as a heat sink. Therefore, the heat is drawn...

What are the electrical requirements for my Warmup system? Please verify that the circuit can handle the amount of amperage your heating system requires. Your...

What does “ER1” on the thermostat display mean? The ER1 message will also occur if no floor sensor is connected to the thermostat. Have...

What does COMMBOX error code “SensErr 1” mean? Error 1 “SensErr 1” will appear when there is a communication error with one (or more)...

What does COMMBOX error code “SensErr 2” mean? Error 2 “SensErr 2” will appear when the upper limit sensor is not connected or has...

What does it mean if my thermostat reads “overload” on this display? The overload message will occur if more than 15 AMPS has been connected to the thermostat....

What does the ‘!’ mean on my 4iE Screen? This may also mean that you have not yet registered the actual thermostat under your location...

What Does the HI/LO Error message mean on my COMMBOX? The HI/LO error message means that the ambient sensor readings (on snow sensor) are out of...

What does the triangle with an exclamation mark (!) on my 6iE mean? If the 6iE displays a triangle with an exclamation mark (see below) a limit temperature has...

What if my TH115 floor heating thermostat is not turning on? The first items on the checklist would be to ensure that the breaker is on and...

What if my TH115 Floor Heating Thermostat says system is on however the floor is not heating up? If you installed your thermostat over 3 years ago and it seems to be functioning the...

What if my thermostat screen is black and won’t turn on? If your thermostat has no display and will not turn on when power button is pushed,...

What is a Dual Cable Tester and how do I use it? The Dual Cable Tester monitors up to two cables concurrently and monitors the integrity of both...

What is a TDR Meter and how do I use it? The TDR Meter is used to measure the distance to an existing fault in the wiring...

What is the Control Period mean on my Warmup 6iE? The "Control Period" checks the difference in the current measured temperature and the set temperature in...

What is the Lock Icon on my 7iE Thermostat? Learn what the lock icon on Warmup's 7iE Thermostat means and how to clear it.

What is the triangle exclamation mark icon on my 7iE Thermostat? Learn what the Triangle Exclamation Mark icon on your Warmup 7iE Smart Thermostat means and how...

Which Floor Probe Usage Should I Use for my 7iE Thermostat? Learn which floor probe usage is most suitable for your Warmup 7iE Thermostat and how to...

Why do single rail towel warmers have temperature variations? Temperature Variation in Single Rail Towel Warmers     The variation in temperature of a Single...

Why hasn’t my Controller activated my snowmelt system if its snowing? When the LTC is ON, your system will not turn on if temperatures reach or drop...

Why is my floor heat not working even though there are no error messages on my thermostat? Discover why your floor heat is not working despite there being no error messages showing on...

Why is my Floor Temperature Reading Incorrect? If your floor temperature reading significantly varies from the actual temperature of the floor, the sensor...

Why is my floor temperature reading incorrect? If your floor temperature reading varies significantly from the actual temperature of the floor, it could...

Why is my thermostat flashing? Is your thermostat display flashing? We'll be happy to help get you on the right track...

Why Won’t My 4iE Connect to the Internet? Check you are using a WPA2 password format (less than 10 characters) on your network. Click...

Why wont my 6iE connect to internet? Are you experiencing issues connecting your 6iE to WiFi? Find some useful tips for resolving this...

Can I have a technician come to my home? Are you looking for troubleshooting support at your home? We are here to help online and...

How do I perform a GFCI Test on my thermostat? Do you need to test the GFCI on your Warmup thermostat? This post will provide the...

How does the infrared thermal camera work? Are you experiencing uncertainty with your underfloor heating and looking to get answers? An infrared thermal...

Why does my thermostat say test monthly? Are you wondering why your thermostat says test monthly? Wondering what you should do? Learn all...

What can I do if my old thermostat has stopped working? Does it appear that your old thermostat has stopped working? Learn more here about what you...

Why is my thermostat display sideways? Is your thermostat screen displaying in the wrong direction? We're sorry for the inconvenience. Click here...

Why wont my thermostat hold information? Are you finding that your thermostat is not holding your changed settings? Try this quick fix...

Why is my thermostat stuck on the Warmup screen? Is your thermostat stuck on the Warmup screen? To advance you'll want to confirm a few...

Is it possible to repair damaged underfloor heating? If you are experiencing issues with your underfloor heating system you may be wondering if it...

Can I delete a WSM in the application? If you've added a WSM in the app that you'd like to remove you can find...

What should I do if I change my WiFi settings at home and my WSM is not online anymore? If your WSM has lost internet connection you can read more here on how to get...

How do I perform a factory reset on the WSM ? You may find that you need to do a factory reset to your WSM. If this...

How do I connect my WSM-252W to WiFi? Looking for help connecting your WSM-252W to WiFi? Follow along here for support.

How do I conduct a floor probe test? If you believe that your floor probe readings are inaccurate or if you are getting an...

How do I test my heating cable(s)? Warmup recommends testing your underfloor heating cables before, during, and after installation. Follow along with this...

What is the difference between a Watch Dog and an Alligator? It is important to test underfloor heating cables before, during, and after installation with the proper...

Sensor not Triggering may be Low Temperature Cuttoff You may need to change the setting for the "Low Temperature Cutoff - LTC."  Click "Read...

ER1 on the Thermostat Meaning The ER1 message will also occur if no floor sensor is connected to the thermostat. Have...

Should I perform a Reset or Power Cycle my 4iE? First, loosen the screws at the bottom of your unit at shown in the video clip...

Why is my 4iE Showing an ‘!’ on the Screen? Ensure you have created your account and registered the thermostat using the Device Number. Click "Read...

How can I keep my relay from being loud or buzzing? All relays ‘buzz’. A good example is the transformers for low voltage lighting in the house....

TH115 Floor Heating Thermostat Keeps Tripping One reason your floor heating system keeps tripping has to do with whether you have multiple...

How to Fix TH115 Error Message: “ER” Floor Heating Thermostat What do you do when this message appears?  Click "Read More" for details.

How to check the resistance readings of your electric floor heating system. To ensure that the floor heating system will function properly, always check the resistance readings of...

What Does the Control Fault Error Message Mean? The Control Fault message might occur for several reasons. Please contact your electrician to have them...

What Does the Error Message on my Tempo Mean? If you see the floor sensor error icon on the screen it means that your thermostat...

How do I test my system using a Megger (Mega-Ohmmeter)? The megger is used as a quality control measure to test the insulation resistance to detect...

How do I test my NAMSR self-regulating cables? This page explains the purpose of testing your self-regulating cables and how to perform these tests.

Where do I place the sensor probe when installing in-slab cable? The thermostats sensor probe can be installed in a number of ways and must be housed...

What is causing my thermostat to keep tripping requiring that I press the reset button? One reason why your thermostat keeps tripping could be that you have GFI on the thermostat...

Why does my sensor trigger without precipitation? This could indicate your sensor needs to be cleaned.  Click "Read More" for instructions.

My sensor just sits there. What could be wrong? Try these simple troubleshooting tips to isolate what the issue could be.  Click "Read More" for...

After a deicing cycle is complete my pavement still has some snow on it. Why? This could indicate that you need to adjust your trigger temperature setting.  Click "Read More" to...

The sensor relay is closed but the deicing system is not running. Why? A good place to begin troubleshooting is at your breaker or contactor.  Click "Read More" for...

The yellow light at the bottom of my sensor keeps on blinking. Is something wrong? Quite the opposite actually.  A blinking yellow light on your snow melting controller means everything is...

How to work around a faulty ETOG sensor ? To work around your faulty ETOG sensor click "Read More" for details. 

How do you find out if your ETOG sensor is defective? In order to determine if your sensor is defective, click "Read More" for details.

My Floor Heating System Keeps Tripping The GFCI in thermostats are Class A, which means below 5mA trip levels. This is a...

Error Message – E2 Learn what to do if this message appears.  Click "Read More" for troubleshooting suggestions.

Why are my floor heating system resistance readings not the same after several years? After getting a "Ground Fault" error on your thermostat you may find out your heating system...

What if my UCCG floor heating thermostat says system is on however the floor is not heating up? If you installed your UCCG floor heating thermostat over 3 years ago and it seems to be...

My GFCI keeps tripping without pressing the Test Monthly button on the UCCG floor heating thermostat This error could indicate several different issues.  Click "Read More" for details.

Make sure that the floor probe that came with the floor heating thermostat was installed and done so properly. It is vital that the floor heating thermostat's floor probe was not only installed but done...