topic Re: Nest Thermostat Gen 3 hot water schedule not working in Nest Thermostats

Nest Thermostat Gen 3 hot water schedule not working

Arulras — Tue, 02 Nov 2021 18:08:42 GMT

My thermostat has suddenly stopped controlling the hot water according to the schedule. I am able to boost on & off just fine but for some reason the hit water is not coming on at scheduled times so we often have cold water in the morning - not ideal! Any suggestions?

It's a new installation with a system boiler and unvented cylinder.

Thanks

Re: Nest Thermostat Gen 3 hot water schedule not working

Jack_cf — Tue, 02 Nov 2021 18:52:22 GMT

I'm having this exact issue. My hot water is scheduled to come on, but is not... Boost works fine.

Re: Nest Thermostat Gen 3 hot water schedule not working

NRUK655 — Wed, 03 Nov 2021 07:23:03 GMT

Have similar problem- have hot water scheduled for morning and evenings. Evening is working but in the morning heating working but hot water not working. Boost works fine

Re: Nest Thermostat Gen 3 hot water schedule not working

emmalavaine — Wed, 03 Nov 2021 17:20:16 GMT

Hi all,

I’ve the exact same issue - last two days the hot water hasn’t come on, boiler not firing up even tho it is scheduled & I’ve not changed any settings. Boost works ok & heating is ok.

I hope Google sorts this out ASAP as no hot water in winter isn’t good !

Re: Nest Thermostat Gen 3 hot water schedule not working

Arulras — Wed, 03 Nov 2021 17:32:38 GMT

I've just noticed that Nest Labs have been replying to reviews in the Play store so have re-posted my question there, let's see if we get an answer as looks like I'm not alone.

Re: Nest Thermostat Gen 3 hot water schedule not working

emmalavaine — Wed, 03 Nov 2021 17:40:38 GMT

Good idea, I like your style. Lets hope it works & they respond.

Re: Nest Thermostat Gen 3 hot water schedule not working

Mel2 — Fri, 05 Nov 2021 23:19:48 GMT

Also the same here this week.

Re: Nest Thermostat Gen 3 hot water schedule not working

emmalavaine — Sun, 07 Nov 2021 06:50:41 GMT

Me again,

I thought the problem was rectified but it didn’t come on again last night or this morning what the heck is going on Google ?! Please reply & fix these issues.

Re: Nest Thermostat Gen 3 hot water schedule not working

Arulras — Sat, 20 Nov 2021 09:49:09 GMT

In the lack of a response from the community and from the developer via Play Store, I started messing around with settings on the Thermostat on the off chance and believe it or not found a setting that turns the hot water schedule on and off, which I didn't recognise and can only presume had been added in an update? Somehow this had been set to off so I set it to on and now the schedule works fine. What a stupid thing but also simple to resolve, thankfully. Good luck all

Re: Nest Thermostat Gen 3 hot water schedule not working

tobeginagain — Sat, 20 Nov 2021 23:47:28 GMT

Arulras, could you confirm where you found that setting? Proper treat me like an idiot and tell me step by step as though I have no clue (I don't!) Appreciated!

Re: Nest Thermostat Gen 3 hot water schedule not working

Arulras — Sun, 21 Nov 2021 19:05:51 GMT

So I just went into settings on the thermostat (push it and then select the cog icon) then scroll along and up popped an option that said "Hot Water Schedule" and it could be set on/off

Re: Nest Thermostat Gen 3 hot water schedule not working

Noggie — Tue, 23 Nov 2021 19:02:50 GMT

Thank you!! Was so perplexed that my nest didn’t turn our hot water on. We’ve just changed this setting. So boggling that they would do this

Re: Nest Thermostat Gen 3 hot water schedule not working

dguillaume — Thu, 25 Nov 2021 17:50:58 GMT

Thank you so much, can't believe it was so simple but I didn't find it

Re: Nest Thermostat Gen 3 hot water schedule not working

Albourneboy — Thu, 09 Dec 2021 08:01:36 GMT

Got up this morning at 7:30 to find our hot water is being heated but it isn’t scheduled to come on until 8am. I’ve checked that the HW schedule is enabled and it is so why is the water being heated when it shouldn’t be? Also, the app says it’s off when it isn’t. The thermostat itself shows the hot water icon but says it’s off until 08:00. Very strange. Any ideas?

Re: Nest Thermostat Gen 3 hot water schedule not working

dguillaume — Thu, 09 Dec 2021 08:53:52 GMT

I'm very new to Nest but the heating has a "Time to temp" setting, which means you set when you want it to be at a certain temperature, not when you want it to come on, not sure if the hot water also does this.

Re: Nest Thermostat Gen 3 hot water schedule not working

Arulras — Thu, 09 Dec 2021 09:39:50 GMT

Not sure but there's an anti-legionella setting which randomly turns the hot water on to heat the tank to above 65 degrees and kill bacteria. Its only supposed to do that after a long period without use but mine seems to come on weekly. It's a yellow flame which pops up on the thermostat so you'd know if it was that. I don't think hot water has a "time to temp" feature, it should just come on at the set time on the schedule. Are you able to control the hot water from the app ok -- turn it on and off and the boiler responds? Depending on your setup you can check if the relay valve (a small metal box) is actually responding when you use the app to control the hot water - you can hear it whirring open and closed. Also do you have a separate programmer that might be over riding Nest?

Re: Nest Thermostat Gen 3 hot water schedule not working

Albourneboy — Thu, 09 Dec 2021 12:29:10 GMT

Yes, I get the yellow symbol so it could be anti-legionella thing I suppose. The boiler does respond if I turn the water on/off or boost it so all’s we’ll there. I’ll keep a closer eye on it in future to see if it happens again and how often

Re: Nest Thermostat Gen 3 hot water schedule not working

tobeginagain — Sun, 12 Dec 2021 22:50:05 GMT

THANK YOU. life significantly better now we don't need to boil the kettle to bathe our baby daughter 😢😅 appreciated so much.

Re: Nest Thermostat Gen 3 hot water schedule not working

JBspark — Fri, 17 Dec 2021 07:15:22 GMT

Having the same issues as above however my schedule is ‘enabled’. Have reset the schedule to factory settings to see if that works. Still only have boost ability from the app.

Re: Nest Thermostat Gen 3 hot water schedule not working

4376Dairyfield — Thu, 30 Dec 2021 09:14:48 GMT

I have same issue. My heatlink packed up just outside it's two year warranty on Christmas Eve. The hot water not heating as scheduled problem has occurred since spending £189 to replace old heatlink and thermostat, so any savings on heating bills by having nest were wiped out. I deeply regret having a boiler that only operates using this type of technology.