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 Andrew Smith Your Own Question
Andrew Smith
Andrew Smith, Engineer
Category: UK Plumbing
Satisfied Customers: 3626
Experience:  Domestic Gas, Commercial Gas, LPG, Unvented Hot Water, Part P Electrical, Commercial Catering
Type Your UK Plumbing Question Here...
Andrew Smith is online now
A new question is answered every 9 seconds

Following a power cut my Glow worm 30hxi refuses to fire up

Customer Question

Following a power cut my Glow worm 30hxi refuses to fire up on commands from the control device. It will only fire up to heat the water once a tap starts running to bring it back up to temperature and then shuts down again once the tap is shut off. Any ideas?! Thanks
Submitted: 1 year ago.
Category: UK Plumbing
Expert:  Andrew Smith replied 1 year ago.

The boiler should only fire if there is a demand.

This is a heat only boiler so you have a cylinder and radiators, the room stat, cylinder stat and motorised valve fire the boiler.

When on heating only the motorised valve should be fully open (as in the lever slack)

Related UK Plumbing Questions