Valliant EcoTec Pro 28 - Pressure tops out

Joined
5 Nov 2016
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United Kingdom
Hi, i think i may have the answer from other posts, but nothing specific to my issue so want to confirm before calling a tech.
  • Boiler over 5yrs old
  • Cold Pressure set 1.2
  • Water temp - 60c
  • Heating temp - 60c
  • no noticeable issues with water
  • Heating - comes on and heats up, but soon stops
  • Pressure at 2.9 bar upwards and display flickers between bar reading and temp reading
  • pressing - & + show Sf.h
  • Heating will fire up again after a while when pressure drops
Can anyone please confirm / advise if this points to a pressure sensor problem? Assume this is an engineer call to fix and not something i can do?

Thanks for any help given,
Gary
 
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Excellent, ordered a pump and gauge to arrive tomorrow. Taken the front off and located the valve. Will update on success or ask another stupid question if needed.

Thank v much for the swift reply!
 
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dear Scooby, in theory removal of the front cover of your vaillant (to test/recharge the vessel) is Gas Installer territory, as it forms the room-sealed casing.

Just saying this as DIY Gas Advice is against DIYNOT.com rules, and the helpful advice from steve32 is contrary to this.

That is all.
 

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