Valliant EcoTec Pro 28 - Pressure tops out

[ScoobyG]

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

 

[steve32]

Expansion vessel charge see faq

 

[ScoobyG]

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!

 

[dreadnoughtheating]

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.