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 Rick Ridley Your Own Question
Rick Ridley
Rick Ridley, UK Heating Engineer
Category: UK Plumbing
Satisfied Customers: 1561
Experience:  30 Years on the tools, now retired, Ex CORGI
15546140
Type Your UK Plumbing Question Here...
Rick Ridley is online now
A new question is answered every 9 seconds

I have a worcester highflow 400 and the hot water is running

Customer Question

I have a worcester highflow 400 and the hot water is running hot then cool any ideas
Ralph
Submitted: 9 months ago.
Category: UK Plumbing
Expert:  Andrew Smith replied 9 months ago.

It could be a scaled up plate heat exchanger.

Do you have the GC no. to identify the model?

Customer: replied 9 months ago.
G20 47 311 61 also
G31 47 311 64
Cheers
Expert:  Andrew Smith replied 9 months ago.

ok

Is it G31 (propane) or G20 (natural gas)?

Customer: replied 9 months ago.
G20 Nat gas had boiler running on central heating all OK. Just domestic hot water running hot then luke warm consistantley
Expert:  Andrew Smith replied 9 months ago.

If this has been getting gradually worse the i suggest you get your plate heat exchanger descaled to give the boiler the opportunity to heat the water fully and see if this improves the output

Related UK Plumbing Questions