Main Medway gas water heater

[solodiver2001]

Morning need some help please,problem is pilot lights but as hot water is called for there is none.changed thermocouple with new, cleaned pilot,took high limit stat of (did re connect ) still not coming on so running out of ideas.
how far should thermocouple sit above flame its as if its not in flame is this the cause but there is no adjustment..also how long do these units last is it time for customer to replace??

many thanks Steve

 

[broggo]

Needs a diaphragm fitting in the water section. Current one has a split in it.



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[stevetheplumber]

i assume you are not gsr and shouldnt be opening water heaters if pilots alight why are you changing thermocouples

 

[solodiver2001]

I am GSR i asked for advice not to be spoken to like a child u ****

 

[broggo]

People are too quick to judge on here. I'm guessing that there are a lot of lads who are just out of their time and still learning. A helpful pointer in the right direction doesn't hurt. As long as we don't go into detail of how to start stripping down appliances then I think alls well. I wish I had a forum like this when I first started.
Cut the guys some slack. We were all beginners once. (still learning now) things always crop up that make us scratch our heads.


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[diamondgas]

Why change t/cupl solodiver2001, is the pilot going out when you call for hot water? If pilot is staying on and no h/w then it'll most likely be the diaphragm as mentioned

 

[solodiver2001]

I replaced thermocouple as a starting point as was very worn the pilot was not lit when i arrived at property . I am a newbie to gas safe passed my exam in March this year and this forum is a very good tool for fault finding. Thanks for all comments positive and negative i ll update when i repair it.

 

[jtsplumbing]

These old main medway multi points are well past sell by date now, if you pilot is lit no hot water it will be gas valve fault, could be diaphragm (10/17572) but check that none of the buttons are sticking that will also stop it fireing, dont know if part still avail, so could be looking at replacement. Starting from 2013 water heaters will have to be condensing, somthing else to think about.

 

[splinterdream]

If you want to fault find, first try to find out how the appliance works. How does the pilot light stay lit? what happens when I turn on the HW? Where does the water come into the appliance and where does it go to get hot for exiting the appliance? The manafacturers instructions can sometimes be helpful with this. There will be a diagram at the front. Try to speak to the manufacturers technical helpline and ask them and always have a pen and paper ready and make notes.

 

[Mike Jackson]

All this is covered in the water heater ACS. It will also be in the CITB/Viper etc. text books.