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, Home Appliance Technician
Category: Appliance
Satisfied Customers: 3609
Experience:  Gas cooker specialist
46681511
Type Your Appliance Question Here...
Andrew Smith is online now

Situation Boiler stat turned to off, controller to demand hw

Resolved Question:

Situation Boiler stat turned to off, controller to demand hw valve opens, pump turns and then goes off after 45 seconds. Valve resets, pump turns off. On central heating the system continues to run for minutes in this config.
My question I was trying to isolate boiler from problem is the programmer the only item that knows about time and difference between CH and HW - I have checked all external and internal stats and as the boiler is not allowed to fire up (As turned off) it cannot be stat controlled. Should I replace programmer?
Submitted: 2 years ago.
Category: Appliance
Expert:  Andrew Smith replied 2 years ago.
***** ***** : Do you have a motorised valve in the airing cupboard?
Customer:

Yes it is an S system two valves

***** ***** : Can you confirm if everything shuts down because the valve shuts?
Customer:

I can say that I have checked with a volt metre and can see the HW demand go off and the valve wind back, the pump also stops

***** ***** : Are you checking power to the brown of the motorised valve?
Customer:

No but can do now

***** ***** : Ok, let's start there and work our way back
***** ***** : If the power is constant there and valve keeps closing then it is a faulty valve
Customer:

Power is constant and valve just closed

Customer:

Am I correct in assuming the orang wires are switch returns?

***** ***** : Grey and orange make to fire the pump and boiler
***** ***** : Depending on the valve you can swap the motor, or you may have to swap the whole head
Customer:

Andrew thank you, ***** ***** the motor a year ago, looks like it has gone intermittent again its a honeywell

***** ***** : No problem, well found
Customer:

thank you for your time Andrew cheers

***** ***** : If you have nothing further, just lick accept to close the question
Andrew Smith, Home Appliance Technician
Category: Appliance
Satisfied Customers: 3609
Experience: Gas cooker specialist
Andrew Smith and other Appliance Specialists are ready to help you

What Customers are Saying:

 
 
 
  • You did one super job of explaining to me everything there is to know about this fridge. I'm looking forward to asking you questions in the future. Jimmy
< Previous | Next >
  • You did one super job of explaining to me everything there is to know about this fridge. I'm looking forward to asking you questions in the future. Jimmy
  • Wonderful service, prompt, efficient, and accurate. Couldn't have asked for more. I cannot thank you enough for your help. Mary C.
  • This expert is wonderful. They truly know what they are talking about, and they actually care about you. They really helped put my nerves at ease. Thank you so much!!!! Alex
  • Thank you for all your help. It is nice to know that this service is here for people like myself, who need answers fast and are not sure who to consult. GP
  • I couldn't be more satisfied! This is the site I will always come to when I need a second opinion. Justin
  • Just let me say that this encounter has been entirely professional and most helpful. I liked that I could ask additional questions and get answered in a very short turn around. Esther
  • Wonderful service, prompt, efficient, and accurate. Couldn't have asked for more. I cannot thank you enough for your help. Mary C.
 
 
 

Meet The Experts:

 
 
 
  • Rob

    Rob

    Home Appliance Technician

    Satisfied Customers:

    420
    20 yrs. experience with a major worldwide manufacturer.
< Previous | Next >
  • http://ww2.justanswer.com/uploads/RO/royzee1/2012-10-11_16153_serviceengineers.64x64.jpg Rob's Avatar

    Rob

    Home Appliance Technician

    Satisfied Customers:

    420
    20 yrs. experience with a major worldwide manufacturer.
  • http://ww2.justanswer.com/uploads/NE/needapplianceparts/2012-11-9_15310_rickcannon.64x64.jpg Appliance Parts's Avatar

    Appliance Parts

    Home Appliance Tech

    Satisfied Customers:

    82
    Appliance tech since 1992. Factory authorized
  • http://ww2.justanswer.com/uploads/JG/jgrella16/2011-9-12_73730_justanswerheadshot.64x64.jpg Jon's Avatar

    Jon

    Home Appliance Technician

    Satisfied Customers:

    1535
    Home appliance technician with over 12 years experience.
  • http://ww2.justanswer.com/uploads/SE/secondhandheaven/2014-11-23_141828_lge.64x64.jpg George-Allsorts's Avatar

    George-Allsorts

    Home Appliance Technician

    Satisfied Customers:

    1123
    A whitegoods technician with 30+ years service in Domestic Appliance Service & Repair, and General Mechanical & Electrical Repair
  • http://ww2.justanswer.com/uploads/RE/repairman4734/2011-5-21_171048_FarrellPic.64x64.png repairman4734's Avatar

    repairman4734

    Home Appliance Technician

    Satisfied Customers:

    684
    Thank you for your question, it is appreciated
  • http://ww2.justanswer.com/uploads/drcool299/2008-12-16_113651_francis.jpg drcool299's Avatar

    drcool299

    Home Appliance Technician

    Satisfied Customers:

    22
    I have been an Appliance tech for the past 15 years. Worked on most of the branded appliances.
  • http://ww2.justanswer.com/uploads/AS/asterixt/2015-8-31_143917_pic.64x64.jpg Michael's Avatar

    Michael

    Customer Service

    Satisfied Customers:

    2970
    I have been an appliance repair tech for over 30 years and will help you solve your problems.
 
 
 

Related Appliance Questions