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  • FIRST POST
    • Banger696
    • By Banger696 12th Jan 19, 5:35 AM
    • 47Posts
    • 2Thanks
    Banger696
    Gas boiler money saving question
    • #1
    • 12th Jan 19, 5:35 AM
    Gas boiler money saving question 12th Jan 19 at 5:35 AM
    Hi MSE community been a while since I posted. Now to the details.


    I have a Potterton Diplomat 82 boiler which is still working apart from now and again when I have to relight the pilot. I am toying with the idea of getting it fixed or a new A rated boiler.



    I have a gas valve and thermocouple and have been quoted 80 to fit these spare parts which should solve the pilot problem as whoever fitted a thermocouple in the past fitted incorrect one as the thermocouple wire is loose in the gas valve socket due to wrong fixing on the thermocouple. So that is option 1.


    I have also contacted Eon for an ECO grant for a new boiler where I would pay 240 towards the cost of a new boiler. I haven't had the Survey yet but not sure what boiler the installer would fit. I have been looking for similar replacements to my freestanding Potterton and all I can come up with is the Worcestor Bosch 30 cdi FS regular boiler, but that is quite expensive around 1000 + installation and I am not sure Eon would stump up that much cash to the installer.


    I have also put out the feelers to 3 installers to quote how much a WB 30 cdi FS would be to fit but that was only tonight so await some contact from those and could save on an A rated boiler with my gas bill.



    Looking for advice on which way to proceed. If the advice is the cheapest keep my G rated boiler and get a repair done that leaves me without a spare gas valve (usually part that develops a fault) or it could last another 30 years like this one has. Should I buy a spare gas valve (around 100) and still available as in the future they will be very difficult to get, if not pricey?


    Your expert advice is welcome.
Page 1
    • jk0
    • By jk0 12th Jan 19, 8:41 AM
    • 2,684 Posts
    • 25,925 Thanks
    jk0
    • #2
    • 12th Jan 19, 8:41 AM
    • #2
    • 12th Jan 19, 8:41 AM
    I would get existing boiler repaired and buy the spares. Modern ones are full of electronics which fail after ten years or so.
    • The Fat Controller
    • By The Fat Controller 12th Jan 19, 10:36 AM
    • 58 Posts
    • 34 Thanks
    The Fat Controller
    • #3
    • 12th Jan 19, 10:36 AM
    • #3
    • 12th Jan 19, 10:36 AM
    I would bite the bullet and replace the boiler..

    Getting spares will become more and more difficult, repairers less familiar with it, someone has already bodged your last repair even though it was only a thermocouple.

    The energy rating difference will certainly save you money on your bills and you won't have a pilot light on all the time too.

    I have a Worcester Bosch combi, the one thing I would suggest is to get it serviced by the manufacturer, they are the only people who have the specific plug-in diagnostic computer.

    As I am not in a service contract and Worcester could not attend soon enough, the last fault I had was troubleshooted by a local engineer using a web search engine on his smartphone, not ideal.
    • Scrounger
    • By Scrounger 12th Jan 19, 10:58 AM
    • 749 Posts
    • 362 Thanks
    Scrounger
    • #4
    • 12th Jan 19, 10:58 AM
    • #4
    • 12th Jan 19, 10:58 AM
    I have a gas valve and thermocouple and have been quoted 80 to fit these spare parts which should solve the pilot problem as whoever fitted a thermocouple in the past fitted incorrect one as the thermocouple wire is loose in the gas valve socket due to wrong fixing on the thermocouple. So that is option 1.
    Originally posted by Banger696
    Why don't you just fit the correct thermocouple then you won't need to change the gas valve. Clean the pilot jet whilst you're at it.
    Should cost a lot less than 80 to do that.

    Scrounger
    Last edited by Scrounger; 12-01-2019 at 11:02 AM.
    • Banger696
    • By Banger696 12th Jan 19, 11:18 AM
    • 47 Posts
    • 2 Thanks
    Banger696
    • #5
    • 12th Jan 19, 11:18 AM
    • #5
    • 12th Jan 19, 11:18 AM
    Why don't you just fit the correct thermocouple then you won't need to change the gas valve. Clean the pilot jet whilst you're at it.
    Should cost a lot less than 80 to do that.

    Scrounger
    Originally posted by Scrounger

    I am not "Gas Safe" and it means disconnecting the burners to get to the thermocouple which is a Gas jobby.
    • Scrounger
    • By Scrounger 12th Jan 19, 11:51 AM
    • 749 Posts
    • 362 Thanks
    Scrounger
    • #6
    • 12th Jan 19, 11:51 AM
    • #6
    • 12th Jan 19, 11:51 AM
    I am not "Gas Safe" and it means disconnecting the burners to get to the thermocouple* which is a Gas jobby.
    Originally posted by Banger696
    (* not usually necessary on a Potterton)

    As I said, should be less than 80 to change a thermocouple even if you pay somebody.


    Scrounger
    Last edited by Scrounger; 12-01-2019 at 11:53 AM.
    • Mister G
    • By Mister G 12th Jan 19, 1:07 PM
    • 910 Posts
    • 548 Thanks
    Mister G
    • #7
    • 12th Jan 19, 1:07 PM
    • #7
    • 12th Jan 19, 1:07 PM
    I'm in a similar situation to the OP.

    My Baxi gas back boiler is now 35 years old and still going strong. In all that time it's had a new gas valve and a new thermocouple, total cost less than 100.

    The Honeywell gas valves are still available, as are other spares. I'm certainly sticking with mine until it fails completely.

    It may only be G rated, but it's very simple and no computer required to mend it!
    • matelodave
    • By matelodave 12th Jan 19, 1:37 PM
    • 4,103 Posts
    • 2,599 Thanks
    matelodave
    • #8
    • 12th Jan 19, 1:37 PM
    • #8
    • 12th Jan 19, 1:37 PM
    It's likely that you wont get much change out of 1500 to replace your boiler - even if it saves you 200 a year on your gas bill it'll take seven and ahalf years to pay back. On top of that you'll have to get it serviced regularly and you'll probably have a repair or two.

    Once yout get into the realms of condensing boilers there are contol panels, PCB, fans and other stuff, all of which are very expensive and less reliable.

    For 50-80 I'd keep the Potterton going for as long as I can, there's hardly anything to go wrong (a gas valve and thermocouple) and they are cheap and easy to fix.

    You could put some money away for when it does eventually turn up it's toes but dont change it until you need to.
    Never under estimate the power of stupid people in large numbers
    • Banger696
    • By Banger696 12th Jan 19, 11:30 PM
    • 47 Posts
    • 2 Thanks
    Banger696
    • #9
    • 12th Jan 19, 11:30 PM
    • #9
    • 12th Jan 19, 11:30 PM
    Thanks for all the replies. Looks like consensus is to keep my old one going. I dont think a new boiler would last as long as this one, it is nearly as old as me.
    • Banger696
    • By Banger696 15th Jan 19, 1:02 AM
    • 47 Posts
    • 2 Thanks
    Banger696
    Unfortunately the old boiler will not light tonight. The pilot lights and I keep my finger on the button for 3 minutes and it just goes out. So I have emailed a local engineer to have a look at it and also to get a quote from British Gas to see if they will fit a regular boiler (W Bosch Greenstar) as that may be an expensive boiler but it will mean minimum disruption to my pipework.
    • thorganby
    • By thorganby 15th Jan 19, 9:22 AM
    • 158 Posts
    • 128 Thanks
    thorganby
    Hi MSE community been a while since I posted. Now to the details.


    I have a Potterton Diplomat 82 boiler which is still working apart from now and again when I have to relight the pilot. I am toying with the idea of getting it fixed or a new A rated boiler.



    I have a gas valve and thermocouple and have been quoted 80 to fit these spare parts which should solve the pilot problem as whoever fitted a thermocouple in the past fitted incorrect one as the thermocouple wire is loose in the gas valve socket due to wrong fixing on the thermocouple.................

    Originally posted by Banger696
    Unfortunately the old boiler will not light tonight. The pilot lights and I keep my finger on the button for 3 minutes and it just goes out. So I have emailed a local engineer to have a look at it and also to get a quote from British Gas to see if they will fit a regular boiler (W Bosch Greenstar) as that may be an expensive boiler but it will mean minimum disruption to my pipework.
    Originally posted by Banger696
    Oh dear, we can all see the direction that this is heading towards!

    You don't seem to understand the function of the thermocouple and you have stated that it was fitted incorrectly and that "the thermocouple wire is loose in the gas valve socket" which is obviously the problem.

    A thermocouple in a pilot flame only produces a very small voltage in the order of a few millivolts, yes that is a few millionths of a volt and it must have a good electrical and mechanical connection into the gas valve in order to work correctly.

    Gas valves and thermocouples are still available for these old very reliable and simple boilers but most gas safe fitters will tell you that it is time for a new boiler!

    The thermocouple is fitted externally and is a very easy job to replace but there is obviously much more money to be made by supplying and fitting a new far less reliable new boiler for you.

    This is a money saving site, so forget getting an A rated boiler and if you are incapable of sorting the thermocouple problem, sometimes the thermocouple nut on the gas valve simply needs tightening, then find someone who can!
    • macman
    • By macman 15th Jan 19, 9:36 AM
    • 42,860 Posts
    • 18,094 Thanks
    macman
    You are aware that BG will typically quote you 40% more than a local independent GSR RGI for a new install?
    No free lunch, and no free laptop
    • grumpycrab
    • By grumpycrab 15th Jan 19, 10:02 AM
    • 3,862 Posts
    • 1,850 Thanks
    grumpycrab
    an ECO grant for a new boiler where I would pay 240 towards the cost of a new boiler.
    Originally posted by Banger696
    even if it saves you 200 a year on your gas bill it'll take seven and ahalf years to pay back.
    Originally posted by matelodave
    Not quite sure why everybody's dismissed the ECO grant. The new boiler could cost you only 40?! So is 240 correct and what would Eon actually fit?
    If you put your general location in your Profile, somebody here may be able to come and help you.
    • mrnkar
    • By mrnkar 15th Jan 19, 10:06 AM
    • 414 Posts
    • 88 Thanks
    mrnkar
    Totally agree. Stay away from British gas. We got quoted over 4000 to fit a new boiler so called a local company. Their quote was 1800 for the exact same boiler but they told me i might be entitled to it for free under a government scheme. They filled the paperwork in for me & hey presto. I got a complete new boiler fitted for nothing. Obviously i give the engineers a good tip.
    Useful sites
    https://www.gov.uk/energy-company-obligation
    You can find a price here to compare with other companies if you don't qualify

    https://www.boxt.co.uk
    • Mister G
    • By Mister G 15th Jan 19, 11:11 AM
    • 910 Posts
    • 548 Thanks
    Mister G
    Unfortunately the old boiler will not light tonight. The pilot lights and I keep my finger on the button for 3 minutes and it just goes out. So I have emailed a local engineer to have a look at it and also to get a quote from British Gas to see if they will fit a regular boiler (W Bosch Greenstar) as that may be an expensive boiler but it will mean minimum disruption to my pipework.
    Originally posted by Banger696
    Just to give you an idea of what's involved, have a look at this

    https://www.youtube.com/watch?v=hKbi2gbgcuk

    Of course, this work can only be carried out by a GasSafe engineer.

    The part is less than 10.
    • thorganby
    • By thorganby 15th Jan 19, 11:58 AM
    • 158 Posts
    • 128 Thanks
    thorganby
    Just to give you an idea of what's involved, have a look at this

    https://www.youtube.com/watch?v=hKbi2gbgcuk

    Of course, this work can only be carried out by a GasSafe engineer.

    The part is less than 10.
    Originally posted by Mister G
    A gas safe fitter is not required to replace an external thermocouple on your own boiler, which is an electrical item in the same way that neither a gas safe fitter or an electrician is required to connect a room stat to your boiler.
    • Banger696
    • By Banger696 15th Jan 19, 12:12 PM
    • 47 Posts
    • 2 Thanks
    Banger696
    Guys I also want the gas valve replaced as it has been in there 30 years and has a limited life and have the spare parts. Got the thermocouple off the internet and gas valve a few years back but gas valve will need someone gas safe. Have booked in with local engineer but 21st is the first available appts.
    • Mister G
    • By Mister G 15th Jan 19, 1:00 PM
    • 910 Posts
    • 548 Thanks
    Mister G
    Well, according to post #16, it looks like you're OK to at least replace the thermocouple yourself.

    If that will get your boiler working, then it's worth doing!
    • The Fat Controller
    • By The Fat Controller 15th Jan 19, 2:43 PM
    • 58 Posts
    • 34 Thanks
    The Fat Controller
    If you do go for a Worcester Bosch boiler, have a look on their website for local accredited installers, you may get an extra warranty doing it that way too.

    My installation was 60% of the price that British Gas.
    • Banger696
    • By Banger696 15th Jan 19, 10:46 PM
    • 47 Posts
    • 2 Thanks
    Banger696
    Well, according to post #16, it looks like you're OK to at least replace the thermocouple yourself.

    If that will get your boiler working, then it's worth doing!
    Originally posted by Mister G

    My boiler so old that the thermocouple is internal to the burners and not like the youtube video so I reckon its a gas safe jobby as you have to disconnect the gas pipe and slide out the burner tray to get access.
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