worcester bosch digital receiver & rf thermostat problem

Hi Keith,
Yes, I've done the same, but i think rubbish kit is putting it mildly if it can't go through a plastic flap and cupboard door.
I've also disconnected the wireless router, and that didn't help.
As of last evening I have the stat 5 feet away from the boiler and it seems ok.
Even in it's original position the stat is no more than 6 metres away on the same level as I live in a bungalow.
Mine is still nder 2 years old so their engineer is coming out on Monday to have a look, although I don't see what he can do other than replace the transmitter and receiver.
When contacting worcester bosch, they didn't mention a charge if no fault was found, as was other peoples experience on other postings?



Worse case scenario and it's an ongoing problem, if it's do-able, I will replace the stat with a hard wired one, hence my question.


Cheers
Dave

Please let me know how you get on, as I suspect I may have to do the same. It's working fine at the moment, but I suspect it's only a matter of time before the problem returns.

Keith

If your boiler is under warranty have a word with your installer or Worceser Bosch. My installer told me (after he had fitted the boiler) that as the boiler was covered under a 7 year guarantee and he was an accredited installer, he would expect them to cover the thermostat/programmer under it and he would contact Worceser Bosch himself with any problems.

Hello again,
The worcester bosch engineer came out and changed the stat and programmer under the warranty with no problems or arguments.
Obviously, thats all you can ask of them, so i'll see how it goes.
All was good last night but if there are further problems it must be down to the strength of signal through the cupboard door etc.
Anyhow, here's hoping, and I'll post again if there are more problems.

Cheers,
dave

Before trying to reconnect, check the battery contacts in the transmitter. Pull the battery compartments out completely and adjust the contacts, particularly the right hand one which is the one which powers the wireless connection. The left hand one powers the display. This is probably why they only work intermittently when you are moving the transmitter around. Also batteries can vary slightly in size.

This one defeated me too, in my case a Worcester Bosch Group DT20RF Programmer with Digistat radio frequency controlled room thermostat – until I read the blogs and saw a lot of other people have been having the same problems as me. I am neither an electrician nor a heating engineer but I do handy work for a letting agent, so I am called to all sorts of central heating and hot water problems – all of which I can usually fix or diagnose for the experts

So, here’s the combined wisdom of 3-days searching blogs, reading manuals and system testing


1. the radio control on the thermostat seems to only have about a range of 2 meters. This is not mentioned anywhere in the manual. In fact, the manual talks about all sorts of potential places to put the thermostat but not that any of them should be within 2 meters ! a distance which frankly makes any other suggestion pointless. I have lived with mine positioned around 4 meters for a year, giving me a previously inexplicable, intermittent system. One blogger suggested a range of 2 meters is probably ‘about right’ so I did a test. I took the thermostat to the furthest point – the back bedroom and immediately the boiler couldn’t ‘see’ the thermostat – the green light flashed and the Mode was locked out; I then sat the thermostat on the cover of the boiler, and it all came back on within a few 10’s of seconds

2. When the boiler can’t ‘see‘ the thermostat, you get a flashing Central Heating Light the Worcester Bosch boiler. Their manual does not mention anywhere what this means. Added to this, the Central Heating Mode defaults to OFF at the same time, which you can’t change by pressing any button. The actual solution is to get the radio control thermostat close enough to the boiler so it can read the signal. You could spend a lifetime . . !

3. BTW Whilst we’re on the subject, the thermostat is counter intuitive:

a. you can see the room temperature on the thermostat but not the set temperature
b. to get the set temperature, you need to turn the dial – but then you’ve changed the set temperature [by ±1°C]
c. when you dial the temperature you want, whatever you do, don't press the obvious Set button, because that wont set the temperature you want, but instead it will reduce the setting to the default minimum of 15°C – you’re supposed to hit that when you go out. You could easily think though, that you’ve turned up the heat when in fact you turned it right down – remember, you can’t see the Set temperature
d. the thermostat reads in ½° increments but only sets in 1° increments

(what was wrong with a dial and pointer ! ? )


BTW I did speak to Bosch afterwards and eventually, after describing the problems to 3-people, Jez was able to say (a) just turn the thermostat to the desired temperature but don’t; press SET and (b) the remote thermostat has a 9-meter range but is affected by other things eg: mirrors, RSJ’s etc. If the central heating does flash red, just press the OK button

i have a worcester greenstar 24i junior now 11 years old the signal has not worked for years between the thermostat and the reciever on the boiler but studied all these posts and i have managed to reestablish the connection. i unscrewed the retaining screw on the bottom of the thermostat and removed it from the wall mounted base plate. i then opened both battery compartments on the bottom of the thermostat removed the batteries to discover that a previous battery had corroded the contact plate and it was coated in a blue powdery coating i scraped this off with a sharp knife. i also slid both battery compartments down and forwards to remove them from the thermostat and used a screwdriver to bend the contacts downwards to make sure the batteries would make good contact and fit tight. i then followed another post about setting the reciever to learn mode and that was that for me problem fixed after operating the boiler manually for many years we can now control it from the thermostat again. i think just removing the blue corrossion coating on the battery terminal would have been enough without bending down the battery contacts. the corroded contact point was on the right hand battery compartment which powers the signal to the reciever so after removing the corrosion i reinserted it into the left hand side as this only powers the display on the thermostat, but all is now working well after many years of being unable to operate. hope this helps and thanks to the previous posts very helpful.

Some good posts, thanks.

I have been having the same trouble, also the battery connection corrosion but it was actually down to putting a metal outside light up in line with the site of the Stat between the boiler-therefore backing the posts that the range is not very good and as best line of site is preferable.

Hope this helps.