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You're getting mixed up here. In the case of the cm907, the batteries power it, where as in yours, the batteries are there as back up if the power goes off.

So are most combi boilers these days volt free switching or mains voltage switching? The RGIs Ive spoken seem to mainly fit wireless programmable stats, but I want a wired one for many reasons. As for why a timer rather than a programmable stat, i prefer the ability to time the heating to...

Just looking at the Honeywell CM0907 again. Why does it need AA batteries if it's wired rather than wireless? The old style 2 channel programmers like mine (Drayton UP2) don't need batteries.

Well I've spoken to a second electrician who is hopefully coming out later this week. He was asking a lot of questions about proximity of CU to gas meter box and how the gas meter must be earthed as part of the job if it wasn't already. The first guy who gave me a quote after visiting didn't...

Sorry, I had a quick look at the brochure of the cm907 and by the look of it and it mentioning AA batteries I assumed it was wireless. I know some programmers have battery back up for if the mains power fails so it keeps the time and settings, but this one looked different. Yes Salus doesn't...

Thanks, I'm sure I'd read on here about a Salus wireless programmable thermostat that didn't have simple on/off/timed features as per a traditional programmer. Call me old fashioned but I'm not sold on wireless controls. Give me a wired programmer and roomstat any day.

My CH system is to be overhauled soon and I'm trying to understand these new controls. I understand a programmable room thermostat allows you to set the temperature to be different at different times of the day/on different days, but is it also a programmer, allowing you to simply set the...

From what I've seen, the DP isolator is just a big switch. Again the ones I've seen (in the flesh and in pictures) have been attached directly beside the meter on the backboard. I've only seen ones in internal positions though. Of course in my house, the meter and board is outside with the...

Out of interest, is it OK to have the isolator fitted next to the meter if it's outside? I ask as my meter is in a box on the outside wall. I'm not sure I like the idea of a master switch for the entire house's electrics mounted in a box that anyone with a meter box key/long nosed pliers can...

It really is a tough one isn't it. Am I right in thinking the correct/legit option would be one of the following: 1. To get the DNO out beforehand to pull the main cutout and then afterward to re-instate it. From reading my suppliers FAQs, you get a 2 hour appointment for each which wont...

Interesting points John. All I've done is call a guy who is registered with a trade body (found him on their website) and asked him to come out and quote for the replacement. It's only through sites like these (and my own inquisitive nature) that lead me to ask how he intended to deal with the...

So is the concensus that it's better to pull the fuse as opposed to taping up the terminals and working live? Out of interest, using the working live method, if anything went wrong, what's the worse that could happen to my house? (Im already aware it could be fatal for the installer).

So to clarify, 1. I should get an EIC from the installer, either same day or within a few days of the job. 2. Then he (I'll be using a scheme registered guy) notifies building control and... 3. Consequently up to 6 weeks later I will receive a certificate of compliance. After...

Schedule of works? I phoned one guy and he gave me a price over the phone! Seems strange to me as I thought they'd like to visit to give a proper quote.

Thanks, good advice. I presume I need to ask for a EIC upon completion of the work and ensure that the installer notifies local building control? Is the certificate issued on the day the work is done or do you have to wait? If you have to wait, is it normal practice not to pay up until you...

I'm getting quotes for a new boiler and one of the RGIs has said he would use a magnacleanse to clean the system rather than a chemical clean or a powerflush. The magnacleanse appeals to me as it promises to remove a decent amount of sludge, but is a lot more gentle on the pipework than a...

Just had a look at mine and its not a seal (as that appears torn when the digital meter was fitted). There's a ring of wire roud it that you'd need to cut to pull the fuse.

Out of interest, where's best to find a decent electrician? NAPIT/NICEIC? Are these any reassurance of quality? I presume you must hold a certain qualification to join? I know to avoid checkatrade and ratedpeople etc. I'm struggling to find recommendations off friends as most of them are either...

Yes, not a bad idea. I was just thinking ahead, and if I can get a sparky who's authorised by the DNO (if that's even possible) then I'd rather get them out in the first place than waste someone else's time.

You did well to find that on your DNO's website. I've been looking over Northern Powergrid's site but can only find a reference to a procedure for when the meter is changed and the electrician needs to break the seal. May have to give them a call. However, i guess that the electrician would...