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  1. Z

    Powerflushing a system with a Powermax

    Hello, I have a job with a Potterton Powermax system that is badly clogged up with sludge/rust from several leaks/ignored problems etc. I want to powerlush it to try and solve some of the problems, and I just want to get clear in my head how to go about this. I guess i'll disconnect the...
  2. S

    Potterton Powermax with mains water problem

    I’ve been called out to a problem with a Potterton Powermax involved. The water pressure coming out of every tap dies off after around 30-50 secs. I took the multi-block off & pressure tested the mains where I have over 4 bar coming in. I changed the multi-block & although I have a slight...
    • Simon C
    • Thread
    • expansion vessel mains potterton powermax problem water water pressure water problem
    • Replies: 1
    • Forum: Central Heating Forum
  3. Z

    Potterton Powermax HE: Only generates one showers worth of hotwater at a time

    I've just moved into a property with a Powermax HE boiler, and it only seems to produce one showers worth of hot water at a time. I then have to boost it for an hour before we can get another shower. The hot water is set to come on from 13:00 to 17:00 every day. Its controlled by a Hive system...
  4. E

    Powermax 155 dilemma

    Hi Everyone I have a very old Powermax 155 boiler which is 20 years old. A couple of years ago, I had a problem with the burner switch intermittently switching off and on and I was close to replacing the boiler but eventually someone came round and managed to fix the problem. I haven't had any...
  5. D

    Replacement for Powermax HE (2006 vintage)

    Dear all. I am receiving quotes to replace a Powermax HE boiler with a combi type in a third floor flat. However they all include costs of replacing the flue & terminal (~£2k) which clearly is prohibitive. The flues and reducer below the terminal are accessible inside the loft space. Please...
  6. Mastermixlee

    Roof work/vertical flues.

    So there's a few estates scattered around my way that have the dreaded powermax boilers. All of them are installed in the middle of house in a cupboard upstairs with vertical twin pipe flue going vertical through the roof. A good majority of these houses are town houses or 3 storeys. How...
  7. gingalig

    Powermax 155 service

    Powermax 155, I have been asked to service one. I'm G3 as well as gas safe. Anything to look out or watch out for ? Customer tells me there is a loud popping noise on ignition, I'm assuming possibly incorrectly this will be the electrodes. I,ve only ever removed and replaced with a conversion so...
  8. J

    Whistling boiler Powermax 185

    Hi! Can anyone help? I have a Powermax 185 boiler which I recently had serviced and now seems to make a constant whistling sound?? We have called back the engineer who doesn’t seem to know what is causing the noise. It stops when the burner switches off and restarts after a couple of minutes...
  9. D

    Potterton powermax he85

    Hi Does anybody know what the error code a27 signifies? It' not listed in the user manual. Thanks
  10. phil hair

    potterton powermax he a27 fault

    got called to a potterton powermax he a27 fault.(dry fire) phoned technical, said was a circulation problem. the pump was turning, water coming out of the bleed valve above burner, could it be the diverter valve is jammed? thanks...........phil
  11. E

    Powermax 1400 boiler - burner not always kicking in

    Apologies for the long post but I'm hoping to get a bit of advice. Last week a plumber came in to replace a bathroom rad with a heated towel rack and remove a rad from downstairs in the hallway. The work seemed fine and our CH and hot water both came on as programmed that night. However the...
  12. abc_plumb

    E.42 Fault Powermax He 115i

    Hi Guys Went out to this boiler today, and don't repair many powermax boiler so was a little stamped. The boiler tries to go through its sequence but the flame lockout led comes on with E.42 Fault displayed. Even with the the lockout led on the 3port valve lever keeps moving back and...
  13. P

    Advice on brand new Potterton Powermax

    Hi I have joined this great forum to try and get some advice from the experts here :smiley2: 9 years ago I built an extension that has been finished externally but due to a new baby arriving work stopped and it still hasnt been completed!!! At the time I bought a new boiler that is still...
  14. D

    Powermax 155x luke warm water

    Hi all i have a regular customer with a Powermax 155x OV with pump and programmer. i changed the flow switch as it was sticking - i also changed the dhw pump as it was faulty after this there was minimal improvement. i then removed the plate and descaled for a day using fernox ds-3 - this...
  15. W

    Powermax 155, if i ever see one again i swear i will..........!

    Radiator change today for a customer with a Promax 155 which i would like to thank for destroying my will to live! These boilers are a nightmare in my opinion. took forever to fill up and vent system no where to vent the system on the boiler (open vented system). it then decides to trip out the...
  16. J

    Powermax 155

    Haven't come across these in a while, pump needs changing on one an they want a service doing. The ones I do remember working on, am pretty sure they were problematic? Issues with flues? Are these best staying clear of? Thanks
  17. Robert Tyrrell

    Powermax 155X OV wiring

    Evening people :) I'm attempting to fit a Drayton MiGenie Internet programmer thingy to a Powermax 155X OV and I can't see how the wiring goes at all. The manual doesn't help as the image is far to small for me to see the stuff I need to see, and if I try to download it from the Internet, the...
  18. J

    Powermax 155x servicing.

    Anyone know where there is an access point for a flue gas analyser probe on one of these things? As usual, there are no servicing and installation instructions. Thanks for any info.
  19. B

    powermax

    that thread got me thinking is there anything on sale that is similar where you put the heat engine on top of a small cylinder
  20. GQuigley67

    Powermax 155x

    My experience with this boiler is 0, was at property earlier installing shower customer also wants service, didn't have gasket so got it booked in for Friday. My question is this boiler a positive pressure boiler? I've noticed the fan is on the air intake( twin pipe system) and the combustion...
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