Honeywell TH115-AF-GA/U Radiant Heating 120/240V Programmable Thermostat with Floor Sensor and GFCI

Thermostat was a perfect replacement for my the one in my heated bathroom floor...easy to install and to program, what more could I want?

If you are reading this, you should be pretty familiar with your options. This unit allows for floor sensing and the modes allow you to heat to a targeted floor temperature, targeted air temperature, or a targeted air temperature while controlling the min and max floor temps. It also allows separate schedules each day with 4 settings per day. Things to know about this (if they matter to you): * You can use either 120 or 240v, depending on how you wire it. * The included instructions do NOT agree with the markings on the unit itself. Input/Output are different in the instructions versus the unit itself. I don't know if this is a typo or a translation problem. (I followed the unit markings and it seems to be working well.) * If you opt for a 24-hr (military/European style clock, you can only have CELSIUS temperatures. Otherwise you only get a 12-hr (AM/PM)/Fahrenheit display. * It does have a heat anticipator option if you want it either click on or off at a certain time or if you want it to decide when to turn on and off to reach the target temperature by a certain time. I like it and recommend it.

Easy to set up and get running right out of the box. Bright easy to read display. If you are replacing an older model thermostat, check the sensor loop resistnce of your sensor wire with an ohm meter. Mine read 17 ohms. This new model comes with a sensor wire that measures 12 ohms. If that's your case, and you decide to keep using your old sensor wire, you may need to up the temperature setting on this thermosat by a few degrees in order to compensate for the higher risistance in the sensor wire. I did that and it works fine.

I bought this thermostat to replace the same one I had before for about six years, but this one lasted two months before it failed. Clearly does not meet any reasonable expectations.

I left a 5-star review for the seller. The product gets 4-stars because the original unit (same model, but purchased and installed by a remodeling contractor) lasted < 6 years. That's twice the warranty period, but I feel an item such as this should last longer. Otherwise, the thermostat is easy to use, has a nice set of programming options, and works well. The original unit's display had gone blank. After verifying there was power to the unit, I bought the replacement, which was also blank. The seller had sent a nice email (via Amazon) to thank us for the purchase and say we should contact them if there were any problems. So I contacted them to ask about troubleshooting the unit. All representatives were busy, so I left a message. Mark, the owner, promptly returned the call. He was extremely professional, friendly, patient, and helpful. As it turned out, I had wired the unit exactly as the old one had been, but the wire pattern has changed. Note to self: always read the instructions. In fact, I had read the instructions - but I was reading the old users manual, which I had pulled out of a filing cabinet when troubleshooting the original unit. Second note to self: make sure you're looking at the correct manual. However, if I'd been paying attention, the wiring diagram is also on the back of the unit. I did not look closely at it because I'd already read the (wrong) manual. So if you are buying this as a replacement, BEWARE! It must be a common problem, because Mark guessed at it right away. Problem solved with Mark's courteous help. Thank you! Greg Harrington (on behalf of wife Mary, who's account was used for the purchase)

Solidly constructed and easy to install. This was a replacement for a failed floor heating thermostat I installed about 10 years ago. By comparison this unit is far superior. It has a large display with backlight, and easy to understand buttons for intuitive programming. It came with Aube Technologies labeling, not Honeywell as advertised.

These Line Voltage thermostats do not have a very good track record in my opinion. They have some seemingly nice features, but those turn out to be just a pain. I have electric floor heat with 7 of these in my house and probably every one of them has been replaced at least once in the last 10 years. If you come anywhere close to their maximum rated amperage, they will have a very short lifespan. But even at far less amperage than that, the relay wears out and is non serviceable. I hate the clocks and day/night mode, its just more stuff to maintain time & reset after a power outage. Wish I could find one with the same appearance with no frills, no clock or schedule, and a replaceable relay. Also, if they get any sunlight at all they will turn yellowish with time. I love the floor heat, but eventually going with a central heat and something less headache. If you must have this style, I recommend using the RC840T-240 remote relay and the Aube TH115 or TH114 24 volt series of thermostats. But of course that will not be a direct replacement for a line voltage thermostat, and rewiring by an electrician will be necessary. Have 2 of those remote relay setups and they have lasted 10 years and still going, albeit a bit yellowed.

Stuffing all the wires into a conventional switch box is a challenge. Although I rated it as 4 stars for ease of use - it's because you have so many choices in heating times. You must read the enclosed manual! I bought this as a replacement for a unit that kept complaining it was shorting out (GFCI kicked in). I was pretty sure that there was not an electrical problem - I took several readings of resistances and could find no underlying cause. I know it was a bit of a gamble - but ripping up the floor was an option of last resort. New one is installed and working fine. If you are not comfortable working on 120V electrical lines then get a reputable electrician to install it.

Facile a installer et fonctionne parfaitement. 👍

This product works GREAT. The thermostat that I had for my bathroom floor had issues after 23 years and we could not find a new one locally. Went on Amazon and got exactly what I needed. It was installed and my floor immediately started to warm up. Highly recommended

After reading other reviews on this listing from other people who had an older one that needed replacing, I felt comfortable enough to give this a try even though it seems hard to nail down the exact same part number. My previous model had PB112B-120GB stenciled inside. New one says PB112D-GA. Based on other feedback I wondered if I might have to add a resistor inline with my already installed floor probe but I tried it without and it shows the correct temp so all seems well. It does look like there is a difference in the GFCI rating with the old stating "15mA GFCI" and the new one stating "Class A GFCI, 5mA". But it works and the old one had failed stuck with a GFCI warning so who knows, maybe this one is more correct for my home. Or it is just working better now but will be more sensitive? I don't know. I am just happy to have a warm floor again.

bad

This is my second TH115. The first one worked perfectly for seven years (I guess that is reasonably good). One day it just died - no display, nothing. I contacted Honeywell support and they responded quickly but the thermostat was finished. The unit can be programmed to suit but I found the out-of-the-box manufacturer's program fine. My only complaint is that $150 it should last longer than seven years given that it is turned off six months a year.