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    Vaillant VCW242EH Luke warm DHW

    Thanks guys. The boiler has the upgrade stainless heat ex fitted. I tried taking the wire off the sensor, and it made no difference. I have some strong acid cleaner, so I'll try that as a new heat ex is about £90. Col.
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    Vaillant VCW242EH Luke warm DHW

    Hello Guys, I've got a problem with a VCW242EH Vaillant boiler. It runs the radiators ok, but just provides luke warm DHW. I've checked the pump and diverter, which look fine. When the DHW is running flat out the water on the boiler side gets very hot, but the DHW doesn't seem...
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    Potterton Puma 80 pilot light problem?

    Hello Dave, The Pilot light is strong, and the fan runs on low whilst the boiler is in idle. I will check the case seal. I'll also check the overheat stat. There's no ivy on the outside of the house by the boiler flue, but, the boiler is on the gable end in the loft, so...
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    Potterton Puma 80 pilot light problem?

    Hello, I have a potterton puma 80 permanent pilot boiler, which is sporadically losing it's pilot. Sometimes it will run for a few days, sometimes it loses it overnight, or during the day. I have replaced the Thermocouple twice now, just to make sure, and it's still doing the same...
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    Potterton puma 80 problem?

    Thanks guys, I may have posted a little prematurely, having now read all the posts for the same boiler as mine. I will check the DHW flow valve and the microswitch. The red light does come on when there is hot water demand. Is the flow switch valve serviceable, or is...
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    Potterton puma 80 problem?

    Hello Guys, I wonder if any of you have come across this problem before? I have a potterton puma 80 permanent pilot combi boiler. When the DHW is used, the boiler dumps all it's water out of the ovepressure valve, just after the tap has been closed. I watched it at the...
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