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Vaillant boiler dropping pressure

Discussion in 'Plumbing and Central Heating' started by richard v, 18 Nov 2016.

  1. richard v

    richard v

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    looking for some help please. i have a vaillant ecotec plus 624 boiler. I recently had to drain the system down in order to change a radiator. The boiler is only a year old and worked fine until that point. I have filled the rad system back up again and bled everything but the heating keeps turning off with a message that says water pressure too low. I refill it but in a couple of hours the pressure has dropped ahain. have double checked all the new connections that i made and none of them leak. Is there something inam missing? Thanks.
     
  2. spraggo

    spraggo

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    How did you drain the boiler in the first place?
     
  3. Hason

    Hason

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    Could have a bit of dirt in pressure sensor giving incorrect reading and you top up system which may have over pressured and opened prv. Get your installer back to have a look
     
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