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 Plumberpro Your Own Question
Plumberpro
Plumberpro, Plumber
Category: Home Improvement
Satisfied Customers: 40
Experience:  Fully qualified plumbing , heating and gas engineer 20 years experience
77408428
Type Your Home Improvement Question Here...
Plumberpro is online now

Am getting an error on my 2 year old Ariston combi boiler Clas

Customer Question

Am getting an error on my 2 year old Ariston combi boiler Clas HE

Error = ERR 504.

Water pressure is OK with 1.0 Bar and there is GAS in the meter.
Any ideas?
Submitted: 4 years ago.
Category: Home Improvement
Expert:  Andrew Smith replied 4 years ago.
Firstly, can you take the pressure up to 1.5 bar.