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When running hot water through taps the boiler ignites but cuts out repeatedly, the water never getting hot. occasionally it displays the code F14

When running hot water through the taps the boiler continuously ignites, cuts out, ignites, etc. the water is becomes warm for a minute or so at a time and then back to freezing cold. twice the boiler has displayed the code F14

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6ya6ya
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Posted on Jan 02, 2017

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SOURCE: Plumbing - no cold water from cold water tap

Hi blondi_1452,

I'm Harvey the Master Plumber.

Your question is: Why would the cold line water be luke warm?

In 30 years I've seen this maybe 10 times. It is relatively rare. But each time it was a cross connection between the hot and cold water lines. It could be this fixture is close to the hot water heater or the cross cnnection is in a faucet or it is in the way the water lines are piped. Anyway I would have to closely inspect the system while running the water in the fixtures in different combinations. Once the cross is located the easiest fix at this point is installing a check valve at the right point. You might consider utilizing thr Repair Directory to find a repairman. Make sure he has solved this type of problem before.

Feel free to contact me again!
Please give me a rating here at fixya.com before you sign off
Thank you,
Harvey your Master Plumber

Posted on Sep 14, 2008

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SOURCE: Combi Boiler - Running warm & then cold!? HELP!

mixing valve must be replaced

Posted on Nov 02, 2008

  • 1 Answer

SOURCE: Vaillant boiler - heating OK, but no hot water.

Most likey problem is the diverter valve, not energising fully. This in turn will not move the little plastic lever arm that actuates the microswitch on the side, sending the signal to ignite.

You can buy a diaghram kit from most local plumb centres, you need to replace the diaghram and seals, don't forget the silicon grease to ensure the plunger doesnt stick. Kits less than a tenner.

You should have noticed before it stopped working completely the water had reduced in temperature before the weeks it failed.

To make sure it is a diverter valve fault, depress the microswitch if you can, when the hot water is flowing and hey presto the demand for hot water light should shine.

Posted on Apr 26, 2009

  • 2 Answers

SOURCE: Baxi solo 3 70pf boiler problem

This happened to me and it was a rubber pipe inside had perished so it was detecting a loss of pressure. You can see it if you take the main cover off and also the front clipped on cover. Its at the top on the right. You need to replace it with heatproof pipe. Good luck!

Posted on Jan 05, 2010

  • 1 Answer

SOURCE: My vokera linea ag plus domestic hot water cycles

I have the same problems, did you manage to get it fixed and what was wrong?

Posted on Mar 08, 2010

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Ideal c24


Hi Jurgie,
I'm Harvey, the Master Plumber,
Happy to render my assistance.

This is your problem!
When you are switching on the boiler it ignites for 8 to 10 seconds, then it cuts off and the lock out lamp comes on. Pressing the reset button or turning on the hot water tap has the same effect.

I need to get the make and model of your specific boiler to give you an accurate answer!
Waiting for your response.
Harvey, your Master Plumber.





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