How JustAnswer Works:
  • Ask an Expert
    Experts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
  • Get a Professional Answer
    Via email, text message, or notification as you wait on our site.
    Ask follow up questions if you need to.
  • 100% Satisfaction Guarantee
    Rate the answer you receive.
Ask Chamberlain Maintenance Your Own Ques...
Chamberlain Maintenance
Chamberlain Maintenance, Plumber
Category: UK Plumbing
Satisfied Customers: 331
Experience:  Qualified Plumber with over 17 years experience in Domestic & Commercial plumbing.
60394188
Type Your UK Plumbing Question Here...
Chamberlain Maintenance is online now
A new question is answered every 9 seconds

I have a vaillant eco max 646 when the underfloor heating comes

Customer Question

I have a vaillant eco max 646 when the underfloor heating comes on the boiler comes to life then trips about 20 seconds later and the information displays code s54?
Submitted: 1 year ago.
Category: UK Plumbing
Customer: replied 1 year ago.
The water pressure on the boiler is 1.5 bar when off rises to 2 bar when it runs with hot water circuit on
Expert:  Chamberlain Maintenance replied 1 year ago.
This error can be a series of things, it is to do with the heat transfer meaning your boiler is heating up before reaching the room temperature and overheating. It will require a gas engineer to be called or maybe Vaillant. It could be the pump, heat exchanger, temperature sensors etc.

Related UK Plumbing Questions