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Old 29-06-2021, 08:52 PM   #1
Darlofan
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Boiler help needed

Have a logic 30+ combi boiler. Daughter had a shower tonight and radiators have got warm in the house!
Quick online search seems to suggest the diverter valve is at fault and quite simple to replace.

Looking at images online of a new part the brass bit arrowed below is the actual valve and black part is the motor.
Any ideas if I can check which one is bust or should I replace both?
Other suggestion online is to just replace actuator inside valve rather than the whole valve.

Or plan C- get a plumber out



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Old 29-06-2021, 08:56 PM   #2
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Get a gas safe engineer out pal, end of.
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Old 29-06-2021, 08:59 PM   #3
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Get a plumber out, you don’t want flooding your house, or blow it up.
They know what they are doing and mostimes it is cheaper as they immediately know what part is gone and what to replace.
There are some good lads out there.
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Old 03-07-2021, 11:24 PM   #4
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Sounds like the diverter to me.. to be precise the diaphragm. Not expensive and won't take long at all.
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Old 04-07-2021, 08:31 AM   #5
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Unfortunately the laws on gas appliances are tight, if that is your boiler and you have taken the cover off, you have already broke the law as you are not gas safe certified (i’m assuming). Obviously this is a picture from the internet, right?

Just get the plumber in who services it
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Old 04-07-2021, 08:34 AM   #6
Andy from Sandy
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I have changed the motor valve on my system.

Who ever did the install put stop valves on every pipe to allow it to be isolated.

There was lots of wires but just did a one for one swap out.

The valve on my system is in the airing cupboard not in the boiler.

They do stick generally in the summer with no use. A gentle tap or two can free them.
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Old 04-07-2021, 08:42 AM   #7
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Change the diverter valve yourself, it's perfectly fine to work on your own boiler in spite of what the gas safe guys may tell you.
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Old 04-07-2021, 09:27 AM   #8
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Quote:
Originally Posted by bluechimp View Post
Unfortunately the laws on gas appliances are tight, if that is your boiler and you have taken the cover off, you have already broke the law as you are not gas safe certified (i’m assuming). Obviously this is a picture from the internet, right?

Just get the plumber in who services it
He's not broken the law by removing the cover as it's not part of the combustion chamber/process. Before removing it though it would need to safely isolated from the electrical supply.

Saying that, I'd still recommend getting a qualified trades person out to diagnose/rectify the fault. If it's a gas fitting related issue, just make sure they're gas safe, in this case, it's probably not related to a gas fitting but still needs a proper diagnosis.

Last edited by nbray67; 04-07-2021 at 09:33 AM.
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Old 04-07-2021, 09:32 AM   #9
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Quote:
Originally Posted by Mac- View Post
Change the diverter valve yourself, it's perfectly fine to work on your own boiler in spite of what the gas safe guys may tell you.
Not entirely correct, but yes, a competent person, electrician/plumber can work on 'non gas' component parts of the boiler.

As with any electrical appliance, safe isolation is key.
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Old 04-07-2021, 09:50 AM   #10
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It's not confined to electricians/plumbers, it's deemed as a competent person and this is undefined as it's virtually impossible to disprove competence. I've got a masters in mech eng, hnd in electrical engineering and BS7671 and Siemens accredited PLC engineer it doesn't automatically assume I'm competent.
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