Discuss 30cdi plus BPS242RF heating issues in the Plumbing Jobs | The Job-board area at PlumbersForums.net

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Phil_188

Hi im new to the website but hoping someone may be able to help. Hopefully I've put the post in the right location. I currently have a 30cdi Worcester unit c/w wireless stat BPS242RF. The stat is set so heating comes on from 5am to 6.30am and from 4.30pm to 9.30pm. The issue is that even with these settings the heaters are continuing to be on and the system is controlling temp to the max 18c set point. This is even when the stat says the system should be off. Does this sound like a stat issue? I've tried resetting and also changing batteries in the thermostat, none of which help. If it is the stat can you reccomend any replacements? Thanks
 
Thanks for the quick reply. Much appreciated.
Before the failure we were looking at changing the thermostat anyway as it had very basic functionality so even if this doesn't fix the issue we'll have a much better thermostat. One other thing we were not sure of is that the stat we currently use is wireless. A couple of other questions sorry to say....
1.We use a lot of wireless equipment in the home now and have recently had a bt hub fitted for broadband. WOuld this cause any issues that you know of, and would it be better to get a wired version of the cm927 stat?
2. At the moment out Boss therm stat is also connected to a Honeywell frost stat. Does this complicate the wiring if i rewire the new stat myself or is the wiring pretty easy to follow?
 
A wired thermostat will always be more reliable but the honeywell wireless ones are very good. There is not much of a problem with other wireless thing interfering with them as they have their own frequency setting.
The boss stats (a rebranded seimens RDJ10) are among the most unreliable.
Just swap the receivers over. There is no need to change anything else or add other wires.
The wiring is on the back of the receiver. Live and neutral and either 1 or 2 switch wires depending on how it has been done. It is easy enough to follow.
 
Great advice from Tamz, but i think your frost stat is bringing the boiler on, i would still fit a Honeywell though
 
The boss stats are well known for developing a mind of their own. They were really a bad stat.
If it was the frost stat bringing it on it would only do so for short periods.
 
Thanks Tamz.

With regards to the frost stat. I did wonder about this but I thought it was just to provide a bit of protection and so would not make my heaters go on fully and increase temp to the indoor thermostat max setting of 18C.
if its the frost stat how would I resolve this/get around this. If its meant to do this i can't wait for the next bill. My boiler is in my garage and frost stat located a very short distance away.
 
If you have a cheap testing screwdriver you can test the frost stat. It just basically a switch and has 2 wires inside and if it is off only one wire will be live.
It should be set to about 6º (the dial is under the cover).
They should really be wired through a pipe stat which will turn it back off when the pipes heat but if it isn't don't worry about it.
 
The boss stats are well known for developing a mind of their own. They were really a bad stat.
If it was the frost stat bringing it on it would only do so for short periods.
Totally agree re boss and Siemens rubbish worst stat ever! Regards frost stat it depends how high it has been set on, funny how fault has just occurred with cold weather landing that's all
 
On the subject of these Siemens RF stats, I was in the plumb center last year, they had literally a black bin liner full of returned ones, the manager asked the rep if they wanted them back, as new ones had already being given out under warranty etc, his reply was "nah bin em, I would need an HGV to take all back" approx 90% recall rate not good!
 
OUCH! It makes you wonder whether the other 10% were working, or just fitted in empty properties?

LMAO Ray the answer is they lasted just longer than 12 months, we only ever fit Honeywell RF after this fiasco, as great we got a credit, but who pays for our time and customer hassle?
 
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