Hi, Im having a problem with the thermostat of one device at home (220Vac, 16A, 250°C). The device had no problems for 10 years and now it wont heat his chamber, unless I heat it with an external source of heat until it reaches near 50°C, then it works fine as it did always. (So the contacts of the thermostat are closed between 50°C and 250°C)

My first question is if this kind of failure is normal in this thermostats, consdering the 10 well worked years I understand it could pass away. Im replacing the thermostat, but I want to be sure that the problem is the thermostat indeed.

Im including a picture of the part im refering to.

Hope you can give me a hand here.

Salucitas!

Element failing.

Just moved into a new home and this is what I found in the thermostat. Only 2 wires are connected, I have 2 other black wires coming out of the wall that I'm not sure what to do with. Any ideas on where these additional wires should go?

Hi, I recently moved into new house and trying to set up the thermostat.

It is an Honeywell t4 (product T4H11 0A 1013).

I'd like to set up different schedule for different days of the week like I used to in previous apt. but I can not because the thermostat is locked in 7 days (full week) default schedule.

I found the way to go into advanced menu here : https://dhb3yazwboecu.cloudfront.net/284/hon-hbc/Lyric_Honeywell_T4_T4M_T4R_Specification_sheet.pdf

But problem is : I do not have the "6:SO" menu, it skips from "5:UL" to "7:NP". Also I have a "8:55" menu and a "17:OP" menu that is not in the PDF.

Can anyone help me to figure that out ? I'd like to set it up differently for weekdays.

I was wondering if someone could help identify why this light is red.

The temperature currently is 18°and I set it to 25° the light turns on and is red and does not always start heating. Sometimes it works, sometimes it doesn't. But the light is always red.

Thank you for your time, hopefully someone can bring some clarity to this.

I just "installed" a new wifi enabled Honeywell digital programmable thermostat that didn't seem to be working properly. By "install" I mean I slid off the old faceplate and slid on the new place on the existing plate that was wired by the professional furnace installer. This was done with the advice of the Honeywell service chat person after I sent him a picture of my wiring.

When I set up the new thermostat using their app it asked two questions I wasn't sure about so I went with the common suggested answer to both questions. HEATING STAGES and COOLING STAGES? For both I entered 1. How would I know that, or find it out? And what would happen if what I entered was wrong?

https://preview.redd.it/6ib1ji9ggexd1.jpg?width=806&format=pjpg&auto=webp&s=1cc103d4ec1eab0191fbc6c2b64e445a2d24065b

I am looking to replace my current thermostat with one that’s programmable. I followed the green wire to the Boiler and it’s hooked up as a common and I measure 24V on it. What are some recommendations that would work

I have a honeywell thermostat that has rc and r wires. Nest has only r, is it possible to install it only for heating, and switch the wires when I need cooling.

I have Honeywell TH8321R1001 with wiring connected to C,Rc,U1, W,Y,G. Is there a Smart wifi thermostat that I can upgrade to without doing any rewiring ? I just want a product which is smart ( wifi enabled) which can be upgraded easily.

It controls a A/C and a heater (gas).

https://preview.redd.it/wv1vbvy1x7xd1.jpg?width=3000&format=pjpg&auto=webp&s=60aeee251cd1adb3f7aaab245460df543e35947a

Staying with my grandmother and she has this thermostat that shut down at some point today and won’t come back on. We have reset the breakers, checked the unit and pushed/held all the buttons down and can’t get it back on. Any suggestions??

My grandmother's existing thermostat has two wires going into the RH slot. The new thermostat says that the RH wires goes into the R slot, my question is do I put both wires into the R slot in the new thermostat? Or do I investigate why there are two wires? The system is heat only.

I am about to replace my thermostat and noticed I have extra unused wires & I have a humidifier that don’t seem to be working can anyone tell me what I am looking at here?

Side note: I did not set this one up, our contractor set this up.

Hey there everyone. Just wondering what the point of these 2 temp settings knobs are for?

I have this thing set to only turn on the heat when it gets below 55 degrees yet it won't even get under 65 before turning on. Anyone have any ideas? 65 is way too high and will use too much oil too quickly for us

We have a vaillant thermostat and I’ve noticed that some days, I put the heating on auto or the hot water on auto and both the heating and hot water never come on. It’s extremely frustrating since this is our 3rd day of no heating or hot water now and we have children. I’ve just had to flip the emergency switch on the boiler (which uses a ridiculous amount of electricity)

We have called the heating services out many times, only for them to tell us to alter our time programming (which we have, they even took a look at it for us) and it’s set from the very early morning to late at night. There’s no reason why it shouldn’t be coming on. I play with the settings, changing it from auto to day to set back. No luck. The water is freezing cold. I bet you in a few days time it’ll randomly come back on again. I don’t understand why it does this, sometimes it doesn’t work for one day then it works the rest of the week just fine, then other times it goes days without working.

I’d appreciate any help.

Brought a DT4 Room Thermostat for my Boiler glow-worm 24 energy , the instructions on the thermostat mention wiring into t1 t2 my connecter in the boiler shows rt(room thermostat?) and 24v , im guessing thats where i connect ,it's bridged with a wire atm ,also guessing the thermostat is just bridging so no polarity ,it's powered by two aa battery's

https://preview.redd.it/wwpetr7dtxwd1.jpg?width=780&format=pjpg&auto=webp&s=2736638a14b6f89f2ed9cde149d7dfe2bcb9ec9d

https://preview.redd.it/9unsxroetxwd1.jpg?width=780&format=pjpg&auto=webp&s=ba6950f92fcfb6a5717794c6967e5c5608b9d6d3

I realize this is not a thermostat, but I am hoping you guys can still help me out. I can tell it's 57° Fahrenheit out here, with 53% Relative Humidity. I can Google what Relative Humidity means, but I can't seem to find any info on what the number 1 in the circle means, or what CH means. Any help would be great! I also realize this info may not be relevant since I just want to know what these numbers and letters represent, but for reference, this photo was taken outside in a tent in Northeast Ohio, and it is about 6:30am.

Attached is the wiring diagram for the thermostat. This was one of the first things I changed when I purchased my house so l'm not entirely sure if this is the issue. I have L and N wires coming from the wall which I have wires as above. What am I missing? Do I need to bridge a connection or something? Or am I looking in the wrong place for the problem. I guess my questions are as follows

1. would incorrect wiring stop a motorised valve from opening?

2.If my wiring was wrong (l assume it is) how do 1 fix it?

3. I have a fair understanding of basic electrics, is this something I should get a professional to look at?

Cheers,

William :)

Apparently the display was slowly going out and my roommate didn't mention it until I noticed it was completely out today.

The display wasn't working at all but the AC and heat still turns on and off.

I changed the batteries, still wouldn't work. Disassembled it, cleaned the connections, and now the backlight turns on but numbers still don't display.

Is there anything else I can do or is it time to get a new one?

Hello! I have this thermostat in my new apartment, and I noticed today that the little needle that should be pointing to the temperature it has been set to is staying all the way to the left.

I can't even find what that's called to look up how to fix it - could someone here point me in the right direction?

Thanks!

I

I have an older thermostat and a 21 year old Payne air handler and condenser. I'm trying to wire in an Amazon Smart thermostat and unsure where the wires go. My old faceplate letter labels don't match up. Where would each wire go to the new thermostat?

I have unused wires and will add a C connection in the air handler. It's the Y/O and W/B that confuse me! Where would they go in New system?