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, Home Appliance Technician
Category: Appliance
Satisfied Customers: 634
Experience:  Heating and hot water heating appliances experienced
77408428
Type Your Appliance Question Here...
Plumberpro is online now

How do I wire in a Horstmann 425 diadem to replace potterton

Resolved Question:

How do I wire in a Horstmann 425 diadem to replace potterton mini minder
Submitted: 1 year ago.
Category: Appliance
Expert:  Plumberpro replied 1 year ago.
Hi , how many motorised valves do you have ? Two or one three port?
Customer: replied 1 year ago.
No motorised valves, it is a gravity hot water with pumped heating via a room stat. The Potterton mini minder had 6 terminals, N.L.1.2.3.4. power supply to N and L. The three "Control" leads went from N.3.and 4. The Horstmann 425 Diadem has 8 terminals. N.L.1.2.3.4.5.6. The L terminal has linked wires to terminal 2and terminal 5. I have connected the power supply to N and L and the three "control" leads to N.4.and 5. but the boiler will not light. One "control" lead must go to N. where do the other two leads connect to?
Expert:  Plumberpro replied 1 year ago.
Hi in the hortsman .
Erth , neutral and live.
1 hot water on , 4 CH on
Customer: replied 1 year ago.
Nearly there, with the "control leads" moved to terminals 1. and 4. the boiler will not light when Hot water is switched on, but instantly lights and pump starts when CH is switched on. What should I try next?
Expert:  Plumberpro replied 1 year ago.
OK hot water on , should go to the wire that was hw on with the mini minder connection 3. This will just be a live straight back to the boilernot including the pump
Plumberpro, Home Appliance Technician
Category: Appliance
Satisfied Customers: 634
Experience: Heating and hot water heating appliances experienced
Plumberpro and 2 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