Honeywell time clock guide by Hancock and Brown

This guide to st9400c will help my customers and others..if your time clocks different this should still help, as a lot are similar

[@johngreen1518]

Brilliant explanation. Better than the manual. Clear to understand.

[@PunPryde]

Been trying to figure this out in our new place snf the manual was confusing, this cleared it all up, thanks!

[@captaincluster316]

Lifesaver thank you

[@cheekyegg]

Thanks. Just moved house and this was very helpful

[@GHancock]

Great feedback, hope you get settled in your new home👍🏻

[@cheekyegg]

@@GHancock cheers

[@sidhussain915]

Very helpful drawing illustration

[@Lemansbluee90]

Brilliant video thank you for helping me save money on my bills

[@GHancock]

Great… thanks for the feedback 👍🏻

[@lieslemery4636]

Super grateful for this video, thank you 🙏

[@GHancock]

Glad to help

[@windspoint]

Still valid, really helpful thank you!!

[@alisongallagher3590]

thank you so much this has been brilliant!

[@sabzisabz9063]

Fantastic thank you

[@superspecky4eyes]

Perfect explanation.

[@GHancock]

Thanks for the Feedback

[@Jbizzle2k9]

Thank you mate

[@GHancock]

No worries 👍🏻

[@tazo1794]

Thanks for your help. 🙂

[@iic3806]

useful. thanks

[@randomhumanoidblob4506]

Great vid, very helpful, thank you. I need to download a new brain cos EVERYthing chez Blob is smarter than I am. Including the cat.

[@JT-dn1id]

Great visuals.

[@harryrock169]

Thank you for taking your time to make this video. Well explained with good speed. Not too fast or not too slow. Just one question ...I've noticed that you've selected 4.10pm for the evening heating right all the way to 11pm, is that normal to have heating for such a long time? I've set mine for 6..30pm to 8.30pm (2hrs) and if need be then just add extra hour. I know different people have different settings according to their pleasure but I think setting for such long hours would expensive. What are your thoughts please?

[@GHancock]

Harun Al-rashid everyone's different, if your property holds the heat long enough to be comfortable Neil you go to bed, then this is great. If you have a room thermostat then you can leave the clock on as late as you desire, as it will turn off at the desired temperature. If you do not, I would invest in one this will pay for itself in no time 👍🏻

[@GHancock]

Harry Rock my misses is the coldest bloody person in the world. If your house keeps the heat it will be fine. But if your setting your mans heating let the house stay warm and control it from the room stat.

[@bethrose522]

Great video thanks, I was able to set the timings. Just one question, if the mode is selected for heating as ‘AUTO’ and you have set the times to when the heating is to come on and turn off, does the thermostat have to be set at the desired time at all times? For example, if the dial is set at 20, will the heating come on even when you have set it to be off? Might sound like a silly question… thank you in advance!

[@randomhumanoidblob4506]

Hi Beth, I've just had the updated version of this installed plus a new thermostat so I'm just a bewildered customer too (tho this is a great instructional vid.) Do you have a programmable thermostat or a straightforward one? Because the answer might be different depending on which you have. If I can help I'll do so, but it's much easier to find answers when you know what questions to ask. And I only know that much cos I got myself in a right muddle - I just need a big red knob on the wall for Make Thing Hot, because all these Smart things we have now just underline the fact I'm not! ;-)

[@randomhumanoidblob4506]

Oh....nuts, I just realised. You mentioned a dial, which I assume is your thermostat? If so, the heat will only come on when told to by the boiler programmer. It will heat up to your thermostat set point then switch off, go on again when the temp drops and so on and so on until the timer stops the cycle. Hard to explain, but say you have your CH set to come on between 8 and 10am with the thermostat set at 20 and an ambient temp of 18. So the room is 18 at 8am and the heating comes on until the room reaches 20 at which point the thermostat switches it off. As the room cools, the thermostat will switch it on again and this cycle will continue until 10am when the timer turns the boiler off REGARDLESS of the thermostat setting. It won't switch on again until the next timed period, so the thermostat acts as the temperature controller within the timed period, if that makes sense? If you want to keep your house at a constant temperature, leave the heating set to constantly on and then it will be controlled entirely by the thermostat and continue switching on and off during the entire day as opposed to just within the timed periods. It really depends on how often you're home, the weather and your house itself. A modern house with double-glazing and cavity wall insulation will retain heat for a long time, so two to three periods of heating should keep it comfortable for you and you can always over-ride. I really hope this explains, if not I'll try again. But if you have a dial I think you have the most basic thermostat and this is how they work. I'll shut up and leave you in peace now 🤗

[@HardeepSingh-wi5bu]

@@randomhumanoidblob4506 This is a really good explanation for running the CH. But I'm having a similar problem with the Hot water. Is the water constantly being heated over the set time period, even if the desired temp has been achieved? Also how do I set the desired water temp please?

[@randomhumanoidblob4506]

@Hardeep Singh Hi Hardeep, Oh man, I feel you.. They give us these houses (well, in exchange for a HUGE amount of money) and we haven't a clue how anything works. HW is basically the same if you have a system boiler (tank in airing cupboard) but I'm afraid I haven't a clue about a combi (no tanks anywhere.) But a neighbour has a combi, so if you need to know for that I'll try and find out. For a system boiler, the thermostat is inside the hot water tank itself and yes, behaves exactly the same way. Whether using the boiler or an immersion heater, it'll heat until the thermostat switches off/on again until either you or the timer controller turns it off entirely for that period. However, finding the thermostat and setting it is a while other pita - it may be different on newer systems but in mine it's a tiny little screwhead about two thirds down the cylinder and I just had to tweak it this way and that until I got the desired temp. They always seem to be set very high, I guess with the idea it'll last a family all using HW at the same time and mixing in cold, so it really depends on your circs, the heat retention of your tank and a whole load of other factors whether or not to change it. However, with fuel prices going the way they are it's definitely worth finding the timer settings that work for you cos otherwise you'll just heat water that sits unused in a tank. There are a couple of other factors - some houses have a type of plumbing whereby if you have the heating on you have to have the HW on too (but not vice-versa). Mine is that type, frustratingly. It depends on the boiler, the tank....sorry, altho it's the same principal it's more complicated. If you have a tank, the best thing to do is ask the boiler engineer or plumber next time they're there for a service how the thermostat is set in your tank, and use the controller to heat up water when you need it. You'll be surprised how little you actually need to heat the water once you work out the magic formula of WHEN to heat it, and most modern systems are immensely efficient if you need a boost - mine gets the water to the desired temp in twenty minutes or so. Happy to try and answer anything I've missed. I just had a new boiler installed and had to get loads of plumbing done so went on a very steep learning curve when really, all I wanted to do was sit and sulk about the cost of it all. So I'm as amateur as it gets but if I know, I'll try and help :-)

[@caroleholdcroft4609]

How do I set my heating to stay on all day from 7am to 10 30pm. I have selected it for the first set but it keeps asking me for the second and third set?

[@GHancock]

Just set times in as if you wanted all three settings.. then instead of running on auto, use the select button to go to the ‘once’ setting. This will ignore all the other on offs. And just run from the first setting until the last one

[@chrissymackenzie-cooper1022]

@@GHancock I have timer ST9420C Please can you advice if I only want 2 programs set how do I set the 3rd program not to come on? Also do I set the water to come on maybe half an hour before the heating comes on or do they both have to be set the same time?

[@20Alexiaa09]

Hello! I have set the time I want the heating to come on using this helpful video. I’m just wondering do I need it in Once mode or Auto mode for the heating to keep to the times I have set? Best wishes, Alex

[@GHancock]

Auto for all your times… once will run from the first setting, skip any other and go off on the last setting. So normally great to flick to if your in all day

[@ilkerahmed]

how to make it heating work continuously when I select continuosly still show time

[@GHancock]

It should stay on continuously if you select it

[@MrMasticko]

If we're at home all the and want the heating to be controlled by the thermostat only, do we set it to continuous? Or will that just blast the heating without the thermostat having control?

[@randomhumanoidblob4506]

You've probably worked it out by now, but yes, if you want it to be solely controlled by the thermostat set to continuous. BUT this is assuming normal thermostat and chances are you want it warmer in the day than at night. Not a problem if you have a smart thermo, but if you don't you'll have to remember to turn the thermostat down at night and up again during the day. It can also be quite wasteful - might be better to set it to be on for the entire day (say 6am to 11pm) then off overnight. Depending on how old your house is you should retain sufficient heat to be comfortable overnight, if not give it a boost period during the night. It takes a bit of fiddling to see what works for everyone but once you're set you're not then having to remember to keep re-setting the thermostat and not paying for wasted overnight heat.

[@snakedeadly]

Great video, a question, would continuous be used if controlling the boiler with a thermostat?

[@GHancock]

If a basic thermostat = No, you don’t want to wake at night sweating when you’ve forgotten to turn it down. But if it’s programmable or a smart thermostat then = Yes, all the times will be controlled via the times on the thermostat itself

[@snakedeadly]

@@GHancock Awesome thanks!

[@MR.S]

My heater is sign is flashing need to change battery how do I do it? And does it affect the heating if I dont change it?

[@GHancock]

This one has no battery, your model must be different, some Honeywell stats have a panel that pulls down to fit 2 AA

[@ryanyoutubechannel319]

Hi What the mean by hot water setting.if we do hot water time set up that's period is on only.is it connect with immersion as well.so when we set up hot water on auto that period is immersion on only?plz can you let me know

[@GHancock]

The immersion should be separate back up.. the clock should only do the gas side normally

[@christophephilippe1481]

Hi thanks for your video, I was able to set my heating after all these years 😊 A quick question please, I have my hot water set to auto, is this correct? It’s always warm when we use it, but does this mean it’s set to a timed programme the engineer set, or does it mean it just automatically comes on when the temperature sensor needs heat to heat the hot water rather than just be heating the hot water constantly im not fully sure how it works (like what auto means) thanks in advance 👍

[@GHancock]

There should be thermostat for heating and hot water.. so if the hot water on it should only get to about 65 degrees and should stop even if the clock says it’s on

[@HardeepSingh-wi5bu]

@@GHancock Thanks for the great video. Can you please direct me to the thermostat for my hot water tank

[@jimmepham3722]

When the heating is on does it heat the water at the same time even if you turn water switch off please

[@GHancock]

Jim Mepham the clock is fully independent controlling However if the system is not piped up this way this will not be possible. If the system has gravity hot water (old style)the hot water will always come on with heating I’m afraid.

[@marisdziedatajs6376]

Can I set 2 both Heating only on AM? Lets say 12:00AM on and 12:30AM off and next ones 4:00AM on and 4:30AM off. My one not allows to do that..

[@GHancock]

Maris Dziedatajs switch then around so the 4am and 12am first then it should let you

[@alveeeeeeee]

Hi Jim - your video was useful I have few questions 1) how long the 'once' setting is programmed for? 2) looks like I have the old piping system so to get heat I need to turn on hot water too? 3) can I have more than two time ranges programmed? I have ST9400A Thanks for your help mate

[@GHancock]

The once setting is from the first time you have set, skips any others and will only go off last thing at night, at the time you have set... ps who’s Jim 🙂

[@GHancock]

Once is from the first time you set to the last nighttime setting

[@nathanielmcgrory1488]

Hi, have you ever come across an issue with a Honeywell ST9400A timer running, i.e., the clock on the Honeywell passes 1 minute for every 4 minutes real time?

[@GHancock]

I’ve seen a few run slow, kinda defeats the self changing hour.. 😞

[@nathanielmcgrory1488]

@@GHancock Thanks for your response. Any idea on how to fix? I am thinking it might be a power issue and going to try change the capacitor?

[@GHancock]

@@nathanielmcgrory1488 I know the omron relays stick, but this only affects the switching, I never get to mess around inside them too much, as I would just replace. Cost outstrips Labour cost.. my own I would give it a go👍🏻

[@pillarsofdoom4891]

Yes but how do you set temp for water?

[@GHancock]

This is on a separate thermostat attached to the cylinder (hot water tank) Located about a third of the tank up from the bottom. A common one is the Honeywell Home L641A Cylinder Stat. Unvented cylinder are often behind a panel ( in this case the wires are exposed and live. So isolate the electrics before removing the panel and adjusting

[@pillarsofdoom4891]

@@GHancock your are a gent!

[@b69ker1]

Does anyone know how to put this in to bind mode?

[@GHancock]

Harry Booker no bind on this model.. but there is rf version