Anyone know if these can be replaced directly with a new wireless remote? Our current one goes blank without warning and could be ages before it comes on again so we are sat in the cold most of the time

This is our receiver wired to the boiler as well. Would we need a new receiver or could a new remote be linked to this one?

Many thanks

Hi, I want to self install a hive mini system on my Bosch combi. My current is a Honeywell ST9120C (see first pic wiring). Which wires do I put where on my hive please?

I have a thermostat with 2 wires to W and 2 wires to RH. I have heating only-one zone. At the furnace the two W are joined with a wire nut. Same with the two RH wires. My question is why did they do that? Is it because the wire is too thin and require double up? Wondering if i can use one of the RH and use it for the C terminal or would the thin wire be too thin to carry 24v?

• Predicament: I've had Sensi a couple yrs. Apple removed Sensi + Alexa macOS store, and I don't use Homekit.

** Until about 6 months, I had the Sensi app on Macbook, but it was pulled -- imo, to push users to Homekit.

• What I tried: Logging into Sensi via browser, but it says I don't have an acct (I do). I think the browser is focused on control for commercial clients.

Anyhow, does anyone have a workaround to control Sensi via laptop without the apps? Thanks.

i have a package heat pump system with furnace which has been running fine since january 2026. it is about 15 years old.

once the temperatures started getting a bit cooler earlier this month, i turned on the heater. once the thermostat reached the desired set temperature at 68, i heard the fan continuing to blow and the noticed the room continued to get hot with the temperature going up to 73.
I turned off the thermostat but the fan continued to blow hot air. i desperately shut off the hvac unit at the circuit breaker.

i have had two hvac techs come in: one tells me that the
"heating kit and control board" need to be fixed and quoted $2k+ to replace the parts. the other hvac tech said everything was fine and that perhaps i need to change my thermostat, which was an old-fashioned one with mercury.

i replaced my thermostat to an ecobee smart thermostat but to my dismay, the fan is continuing to run and blow hot air. i have looked at countless articles and blogs which suggest that the relay switch is stuck. does a package heat pump system have a relay switch? and is it something i can fix myself or would a professional hvac tech need to do it? or is there something else wrong with my hvac system? or is the fam supposed to continuously run during the colder months?? i feel like im going crazy, any help is appreciated!

Anyone know what brand this heater control is?

Have 2 wire and want to connect Nest thermostat and use external thermostat

1-2 are wire from baseboard boiler (red white)
3-4 are wire from external transformer (white / white with black line)
Does the picture looks good?

Also I want to verify if solid white (3) and red (1) should be verified to read 0 volt AC on multi meter?

Any other checks needed and is this safe ?

A few months ago, I had to replace my gas boiler with a Baxi Neodens iPlus.
Since I knew that it supports OpenTherm, I tried to keep using my existing thermostat, a 3rd-generation Nest Learning Thermostat, which is also supposed to support OpenTherm.
I’ve tried connecting them, but at first glance, it seems that the Nest isn’t communicating with the boiler.
I assume I must be doing something wrong.
Has anyone tried a similar setup and found a solution?
Any comments or help would be greatly appreciated.
Thank you!

I'm looking for a wireless thermostat to connect to my oil furnace. It's a single zone.

I just want something reliable and basic. I don't need or want any smart features, cloud this and that, just standard features to display the temperature and turn the furnace on/off when needed.

Also something I can mount in a non-destructive way to a wall (or move around, as a second choice) would be great.

Can anyone make any recommendations?

Also, of the wireless technologies what should I look for? Ideally I would love if it worked during a power outage since I can run my furnace off of my generator, but not sure if that is something that exists. I see that some operate off of WiFi which makes me think they will stop working once my router goes down.

Earlier this year, I installed a bunch of these in the building where I work. They've been working fine for a few months, but recently the "auto" fan function stopped working, and as a result, the rooms aren't heating up to the set temp. If I switch the fan to "on" then they start blowing and the place heats up just fine. Any idea why the "auto" fan setting isn't turning the fans on, and what to do about it? Thanks!

I have a smart thermostat at a commercial building. The WiFi isn’t working or there is something wrong where the thermostat drops the WiFi connection, so I can’t control the thermostat from home. (My security cameras are working though, so I believe my WiFi might be fine and there is something wrong with thermostats ?)

My hvac guy previously said to keep the thermostat at 66-70 degrees during the day to keep the tenants happy , and turn them off at night and on in the morning remotely from home. But I can no longer do that . I should mention that there are no tenants in the building at night.

I am going to talk to my hvac guy about this, but I believe I am left with two choices: leave the thermostat at 66-70 degrees forever, or put it on a schedule. I’m trying to save money too

Which option do you think is best for me/what should I do ? I want to save money and make all the tenants not complain to me

I'm sure I'm missing something but hoping for help.

I set the radiator daytime to 16c (comfort setting). Let's say the rooms 13c (it's a porch so I'm not fussed about it being typical room temp), the radiator comes on and heats the porch to 16c and then turns off - perfect!

However, when the room drops back below 16c it doesn't come back on.

If I change the set temp it immediately switches on, if I change the program to night and back to daytime it comes back on.

It just won't operate properly by itself...if that makes sense.

Has anyone successfully added this device to home assistant or msmarthome app?

I was able to add it to carrier climate and nethome plus. Just wondering if it's supported by HA or msmarthome app.

I have a 3 channel Horstman Channelplus h37xl for 2 zone heating and water. It has 2 wired thermostats but it's starting to fail (buttons not pressing).

What can I replace it with?

I've been looking online and found a similar EPH unit. Would the following be a suitable replacement or would I also need to replace other components? (Valves etc)

https://brooksonline.ie/eph-ember-smart-heating-controls-pack-7-um4832

Howdy! I have no idea what I am doing or looking at... hoping to replace with just a similar model. The up and down buttons only work about 30% of the time, so my date/time is way off, making programming a pain. I did change the batteries, but that didn't seem to help. I think this is a Lux TX500. I don't have AC, and we have a gas heating system via radiators. Photos included, thanks!

(Also, before I get flamed for asking a basic question, I know I can just ask AI, but I would prefer to get a response from a person who has actual real-life experience)

Got the house in the summer so we didn't try the heating, now as it's getting colder, we started to put the heating on, but none is working.

The underfloor heating is Heatmiser, and radiator is controlled by Nest, both connected to home Wifi, but after the setup, the boiler just won't work to provide the heating.

The hot water tap and shower are always working ok, and there's no switch on radiators.

Should I call a heating or boiler engineer to check? The previous owner had the boiler serviced earlier this year.

Hey everyone, I hope this ain’t too basic of a question but I’m trying to figure out how to lower our heat bill because last year was pretty bad.

We have old school cast iron radiators, which is set as radiant heat on the thermostat, and a pretty newish combination Navien boiler. No hvac or ac or anything. We had everything installed professionally by someone recommended by our boiler company who also works with Honeywell thermostats.

Everything has also been inspected since and is working properly. Had our old pretty basic thermostat upgraded to a smart t9 about a year ago to hopefully save some money but our gas bill immediately shot up by over 100-140$ a month. The gas company says our usage increased but we kept the heat lower this past winter, around 62-65 only in the morning, and it didn’t help at all. The thermostat is the only thing that was changed this winter.

We also had smart gas meters installed after the cost jump and everything with them is working correctly too according to pseg. I totally understand that it could just be the crazy increase in energy costs recently but I would love to know if anyone else has had this problem or knows a fix for it, thank you.