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Hi Chris As far as I know, on this boiler the diverter valve simply opens/closes the hot water feed to the rads when the heating is on/off. It can be a bit annoying in the summer because when you turn the hot tap on, it also sends the hot water around the rads, so when it is sticking, like now...

Hi everyone I hope this isn't too long winded, but I understand how it is best to have all the info before trying to help. My boiler is working fine for water, but not for heating. Heatslave 20/25 boiler, approximately 19 years old. When fitted, no room stat fitted. A few years ago I posted on...

Not at all helpful, but when my boiler was broken, I often used my shower to fill up my sink, was just as quick as turning the tap on.

While looking on the internet earlier to try and resolve the connectivity, to no avail, I did see there were three or four different brand names with the same stat as I have, probably bulk manufactured somewhere and branded dependant on order. When I popped the front off, the rear of the unit...

I am thinking the stat is connecting to my router on the wrong channel, it says it can only use 2.4ghz and not 5ghz, so I am going to have to see if I can work out what IP address it has been assigned and make sure it is on the right channel. There is also the issue of the stat saying the room...

All set up and seems to be working, thank you for your help Stem. Can't get the thermostat connected to my phone yet, but apparently that isn't unusual.

Looks like I will be off to B&Q to get a long enough length of cable :)

Just realised the 5 and 6 are the other way around on the one I have, so I would need to Bridge L and 5 on the thermostat and connect boiler terminal 3 to 6?

The rear of the one I have ordered is the same as the one you pictured. The instructions say to connect L and N to 220 voltage power, 5 and 6 to your gas boiler, 1 and 2 are thermal actuators, please do not connect them to your gas boiler. My boiler is oil, and according to the FAQ's when I...

Thank you for the diagram :) I did think the boiler program would have to be set to on, so thanks for confirming.

One of the issues with my boiler is the diverter valve, it doesn't seem to be a very good design and gets stuck open, so when the heating is off and you turn the hot water tap on, it sends the hot water around the heating system. I have replaced the valve at least 3 times over the years.

Beok BOT-313W.BL

I have just ordered one from Amazon, hoping to get it fitted tomorrow or the next day, I am going to have to see where to put it and make sure I have enough cable to run from the boiler to where ever I site it.

I am not sure if 15 years ago there was the requirement to fit a room stat, I guess because my system was fitted by a friend doing it as a favour over the weekend, instead of going through the books, maybe it was something he over looked.

I am guessing if the house/room is cold, the boilers internal tank will continue to be controlled by it's thermostat, to prevent over heating, so switch on/off dependent on the water temperature returning to the tank before the room stat tells it to switch off, the radiators will get hot and the...

Just so that it is clear in my head... As there is nothing apart from the boiler to know when hot water is needed for the central heating, in the current set up the boilers internal water tank is only kept heated when the demand for central heating is switched on? When demand for central heating...

Thank you. I will have a look into room thermostats and also the manual.

Thanks for the reply; The boiler itself has a dual controller for water and heating, both can be programmed independently, daily, weekly, you can also select off/once/twice/permanently on. The flow of water is controlled by a diverter valve in the radiator, basically a spring loaded valve...

Stumbled across this forum while searching for a query I have around my boiler. (Sorry for the long post) I have a Worcester Bosch Heatslave 20/25, when it was installed (about 15 years ago), the plumber didn't fit a room stat. The rads have thermostat valves fitted, apart from the bathroom...