Topic: GFCI Shuts off System

John,

All apologies for not having posted something much sooner, but our online systems have undergone some recent changes.

More than likely, taking into consideration all of your current information about the GFI, the breaker, and Ohms readings, it is possible that the thermostat GFI is not operating as it should.
I would ask however what sort of Ohms readings were taken. There should be all of four readings taken off a floor heating mat. These consist of a core to core reading, ground sheath to ground sheath reading, and a core to ground reading on each end with the Ohms meter set on a 0 to 200 scale. the core to ground readings should return with 0 or infinity depending on the Ohms meter constituting that there should be no continuity between the core wires and the ground wires. The core to core and ground to ground readings however should return with set numbers.
Depending on what sort of readings you return with may tell us more appropriatly what you would need in regards to your system. If you should feel it best, by all means contact our technical support staff directly at 800-875-5285.
We hope that we can get this issue solved for you soon and in the meantime, if there are any other questions we can answer for you, please do not hesitate to let us know! Thanks John!

Topic: GFCI Shuts off System

Joel,

Please give out tech. support department a call, and we will go over the resistance readings on the floor mats. Taking these readings should only take a few moments, and if the floor is working the way it should; it sounds like the thermostat may have gone bad. If this is the case, I’ll see what I can do for you as far as a new thermostat. Thanks, Joel

Seth
800.875.5285

Topic: GFCI Shuts off System

Seth,

The floor is on a dedicated 20 amp breaker. The entire house is served by a relatively new (8 year old) 200 amp service entrance. The breaker for the floor is not GFCI protetected.

It’s interesting that just since I wrote in the last couple of weeks, the floor tripped probably 8 times or more (just about everyother day). It has not even been that extremely cold outside.

Joel

Topic: GFCI Shuts off System

Joel,

It is normal for the GFCI to trip once every month or so, but if you are having more and more frequent trips, it may be an issue with your thermostat. Is this system on a dedicated circuit? What size is the breaker that its on? Is it GFCI protected? Any of these could cause the GFCI issue that you are having. If none of these fix the issue, I would like to go over your ohm readings again, just to make sure that the floor is working the way it should. If that still doesn’t fix the issue, I will see what we can do about getting you a new thermostat. Please call if there are any questions 800.875.5285

-Seth

Topic: GFCI Shuts off System

I bought and installed a system in my bathroom under tile in 2004. From the beginning the system worked well but would occasionally shut off with a ground fault indicator. Flipping the unit off and on always resolves the problem and it starts heating again. The unit might go several weeks without this happening or might do it a couple of days in a row—seems to happen more often when it’s cold outside. I’ve never seen it actually shut off but suspect it happens when the unit first turns on in the morning or evening as programmed. It is very frustrating and I should have called it in when it was first installed and under warranty, but just never did. I’m thinking of installing another unit a kitchen and want to understand this problem before I move ahead with another installation.

The original system purchased was a 17-15B-120T and a TH115F-120GA. all the Ohm readers were great during installation. Test #1 40.5, Test #2 42.9 and test #3 40.1

The intermittant nature of this is confusing. Any ideas on fixing this anoying problem?

Joel