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  1. G M

    Smart Thermostat Install - Worcester Highflow 440

    We have recently moved into a property which has a Worcester Greenstar Highflow 440 Standalone Combi gas boiler. This appears to be a relatively old unit however, it is still in great working condition and has been serviced on a regular basis. I'd like to add a Nest Thermostat to control the...
  2. F

    440CDI highflow Greenstar condensate leak no error boiler works

    Hi Leak is from condensate pump which seems to work fine when restarting boiler it pumps out. Puddle on floor every morning from condensate leaking no error codes heat and hot water working fine. Have ordered new nozzle for pump to hose.
  3. Inverness

    Worcester highflow 550

    hi guys I'm going to be installing a highflow but never done one before any tips appreciated?
  4. Peter J Brown

    Worcester highflow 400 pulsating fan

    Hi guys have a highflow 400 with fan that's pulsating, took hoses off air pressure switch and blew them clean and checked venturi. Connected hoses up again and blew down 1 and fan cam on but didn't fire boiler but was running smoothly. Getting 240 to air pressure and also fan. But the power goes...
  5. Kewat66

    Worcester Greenstar Highflow 440 intermittent hot water

    Hi All, Anyone come across this problem on the Highflow 440. Customer calls and says hot water not working. Sometimes only comes on with heating. I pop out to take a look and all working fine. New call 3 weeks later same problem. Again pop out but when I get there reset boiler and working fine...
  6. gingalig

    Alternative to a Worchester 400 highflow

    Hi, I have a customer that has a high flow 400 in a fairly large bungalow and it’s on its last legs, worchester have stopped making parts for it so time for a replacement, the customer doesn’t want a cylinder and would prefer a wall hung boiler but I’m getting a bit lost in choices, I’m...
  7. S

    Worcester Highflow 3.5 (sealed system) Question

    Hello Everyone I spent some hours yesterday fitting a new filling loop, including draining the entire system and refilling with added inhibitor. All seemed to go well except right at the end i noticed a tee joint was seeping slightly - a joint i soldered some 7 years ago. It's a joint near the...
  8. N

    Problems draining old Worcester Bosch highflow 3.5 combi boiler with header tank

    Hi all. First post from a first time home owner, and very amateur DIY'er. I've inherited an old Worcester Bosch highflow 3.5 combi boiler when i bought this house. I'm needing to drain the system to give it a general clean, and to practice for fitting a new towel rail, and unblocking (or...
    • Niko
    • Thread
    • boiler bosch combi combi boiler draining header header tank highflow oil old problems tank worcester worcester bosch
    • Replies: 2
    • Forum: Plumbing Jobs | The Job-board
  9. F

    Help needed Worscester Highflow 400 RSF

    Cannot have both Hot water and heating on at the same time.So alternate each control when needed. Loft filler tank major overflow when heating /Hot water on with hot water being vented into the tank and out of the overflow. Often have to push the reset button and there is quite often a need to...
  10. C

    High pressure on highflow 400

    Hi i currently have a worchester highflow 400 rsf combi. The past 6 weeks the overflow pipe been dripping water, I've checked the water pressure and this was up to 3 bar. I've had the expansion tank replaced twice (first one was faulty) but the pressure is still high. ive changed the heat...
  11. Y

    Honeywell T40 Worcester Highflow 400 thermostat problem

    Hi, Hope someone can help. Had a room thermostat fault develop on a Worcester Highflow 400 electronic boiler. When the boiler is switched on (by the timer) and the room thermostat has reached the required temperature (in other words it is telling the boiler to stop centrally heating) rather...
  12. M

    Can anyone recommend a decent water softener for an UVHWC?

    Like the question. Need a water softener..was looking at Dualflo anyone got any recommendaions? Also an in line water filter. Obviously ones that can handle high pressures. cheers
  13. B

    Highflow 440

    Ok fellas got a leaking Highflow 440 heat bank only 4 years old! 2 questions.... 1. Anybody changed one and is there anything I need to know, it looks pretty straight forward tbh. 2. Who wants to do it for me whilst I watch and drink tea? :tounge_smile:
  14. G

    Worcester Highflow 3.5 BF

    Got a call this morning off a mate who has the above boiler. Symptoms, this morning boiler was out on overheat stat and pilot light was on but boiler wouldn't fire. When I got there pilot had also gone out on its own. So, never having been to one of these and having no manual. Tried to light...
  15. W

    worcester highflow plate hex, What the hell.

    step 1: follow mi's to swap plate heat hex parrot fashion. Mmm sounds simple enough. step 2: start thinking "youve got to be kidding" step 3: get yourself a massive pile of screws plates ,bits and bobs step 4: think christ i hope i remember where these went step 5: look at your handy work half...
  16. D

    Wocester bosch highflow 400

    Wocester bosch highflow 400 wont start Got this boiler floor standing Worcester that im unfamiliar with. The boiler won't fire up at all when calling for heating or hot water. Its making alot of noise like air in the system, and the pump is running and is hot to touch. There was no pressure...
  17. S

    Worcester Bosch Highflow 400 RSF - Safety Temperature Limiter Thermostat tripping

    Hello. I have a WB Highflow 400 RSF, which was installed in 1999 and is covered by a maintenance contract with British Gas. I recently called BG out because the "Safety Temperature Limiter Thermostat" keeps tripping. This occurs when the CH is OFF but the HW is on. We only know about it when...
    • skinflint
    • Thread
    • bosch cause highflow radiators safety system temperature thermostat tripping water worcester worcester bosch
    • Replies: 2
    • Forum: Plumbing Jobs | The Job-board
  18. B

    worcester heatslave highflow floor standing boiler

    as anyone got a pdf manual for the worcester heatslave highflow floor standing boiler . got to service one next wk thanks ant
    • buckley plumb
    • Thread
    • boiler boilers floor heatslave highflow oil standing thorn worcester
    • Replies: 15
    • Forum: Plumbing Jobs | The Job-board
  19. M

    Highflow 400 no hot water

    I have been to a worcester highflow 400 electronic today which has a problem with hot water. Heating works fine. Pump starts boiler fires up runs for about 20 secs burner goes off for 20 secs and keeps going like that ( Its got to be a circulation problem) and the radiators start to get warm...
  20. B

    Body Spray Jets - System/Unvented vs Highflow Combi?

    Hi y'all, Advice required for body spray jet flow-rates please... Alas money is not unlimited, but would rather get it right first-time around! Incoming MCW pressure seems good. Boiler install in loft of 3-bed house to feed kitchen sink, downstairs WC basin, utility room sink and two...
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