worcester 35cdi boiler problem

Discussion in 'Plumbing and Central Heating' started by rustysul, 26 Jul 2008.

  1. rustysul

    rustysul

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    My boiler was working fine! then i had a plumber in to fit a new sink in a room downstairs, He fitted a T junction into the hot water pipe feeding my kitchen sink. this pipe then runs over the top of kitchen units into a toilet washroom and feeds a sink.
    since this work was done we have problems with the boiler providing hot water, if we run the tap and turn the boiler off then on again it fires up and water is hot!
    any help would be much appreciated
     
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  3. JohnEBoca

    JohnEBoca

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    Is the tap on the sink a Monoblock Mixing Tap. [/color]
     
  4. cider

    cider

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    prob the diaphragm washer gone in the divertervalve and plumber turning water off and on made it fail a few days before it was going to anyway. call a boiler fixer
     
  5. undercover

    undercover

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    turning the hot water tap on will make the boiler fire up and give you hot water.....
     
  6. nickso

    nickso

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    35cdi doesnt have a diaphragm or diverter.
     
  7. nickso

    nickso

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    i think he means it will only run if the power is turned off and on again.
     
  8. DP

    DP

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    I think the moderator will be asking YOU questions if you do not stop using blue text.

    Why would a monoblock sink tap make a difference? Both hot and cold are at the same (mains) pressure.
     
  9. ChrisR

    ChrisR

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    .

    Some did - "35cdi II" weren't they? The ones with only one pump.
     
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  11. mickyg

    mickyg

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    Its all well and good guessing at the problem, but lets face it the original post is confusing and barely makes sense.
    so to rusty
    What happens when you just turn on a hot tap if anything?
    Is it the same result from all hot taps?
    Does the heating work ok?
    How exactly do you get it going again?

    Also a GC no. from your appliance data badge will help us know for sure what model we are dealing with.
     
  12. gremlin16

    gremlin16

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    Correct Chris.

    Don't bother changing them anymore, just pass it on to WB.
     
  13. ollski

    ollski

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    I thought worcester wouldn't touch anything over 10 years old.
     
  14. gremlin16

    gremlin16

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    WB 35Cdi 11 were produced from September 2001 onwards.

    The 2 pump boiler was a 350 and production ended July 1998.

    Not sure what boiler rustysul has?
     
  15. rustysul

    rustysul

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    sorry my question was a bit confusing!
    The boiler will not fire up running hot water from any sink or bath, but if you run the water and turn the mains power switch off then back on again it fires up.
    the new sink does have a mixer tap (not sure what make) But since the the mixer tap has been fitted the tap in kitchen has much more water pressure than before we tapped off with the T junction.

    Please reply your advice appreciated
     
  16. rustysul

    rustysul

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    yes monoblock mixer fitted.
    also c/heating working fine
     
  17. JohnEBoca

    JohnEBoca

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    The HW pressure switch maybe at fault, clean or replace.
     
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