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worcester bosch

Worcester Bosch (commonly referred to as Worcester) is a United Kingdom based heating and hot water products manufacturer.The company was founded in 1962 by Cecil Duckworth as Worcester Engineering Co Ltd in Worcester, England. After changing its name to Worcester Heat Systems Ltd, in 1992 the company was acquired by Robert Bosch GmbH, adopting the new name of Worcester Bosch.
Headquartered in Warndon, the company employs more than 2,000 people across the headquarters and manufacturing plants in Worcester and Clay Cross, Derbyshire, including a network of over 300 service engineers and over 80 technically trained field sales managers.

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  1. R

    Worcester Bosch wires melting

    Hi about an hour ago all the lights in my house tripped out. I went to the fuseboard and one switch was down. Flicked it back and it tripped out immediately. few moments later theres and acrid smell and a little smoke in the room tracked the smell down to the boiler, took the cover off and...
    • redd
    • Thread
    • america bosch urgent usa wires worcester worcester bosch
    • Replies: 41
    • Forum: USA
  2. J

    Worcester Bosch Greenstar Combi Anti Cycling

    Acquaintance has problem with a 5 radiator zoned system which takes ages to heat up. The boiler (don't know output) fires up normally and after ~ 20 minutes reaches its setpoint of 65C, over the next few minutes it will creep up to 70C and then cut out, again fairly normal if min boiler output...
  3. J

    Worcester Bosch combi - HW suddenly runs cold for a few seconds

    Hi - I've searched the existing threads but not found an answer... I've just had a new W-B combi installed and it's excellent. But the question is about what's "normal". My wife and I both take a shower each morning, one after the other, and the shower is turned off for 10-15 seconds while...
    • Jez Cunningham
    • Thread
    • bosch cold combi seconds worcester worcester bosch
    • Replies: 3
    • Forum: Canada
  4. G

    Worcester bosch 42cdi

    HUMING through pipes when boiler not on programed to be on 42cdi switched to eco runs heating and hot water all day ok at night after heating switches off we can hear the HUM through the pipes iv looked at boiler with no burner light on but I think pump is still running any help
  5. D

    Worcester Bosch greenstar 30si locking out

    Having problems with this boiler with the hot water running for about 5 mins it locks out .then after a while I try it again it works for another 5- 10 min then locks out again CH is ok , I’ve done usual checks the gas valves ok and the amount of pressure is there is fine ,and ohms is about...
  6. L

    worcester bosch W11 water heater

    Hi am looking for some help with a water heater that has been driving me crazy. I fitted the Worcester Bosch W11 in a caravan around about a year ago, after fitting this boiler I was having problems with the boiler shutting down occasionally when hot water was flowing so i changed the flow...
  7. C

    Worcester bosch greenstar 28i Junior no HW

    I have a worcester greenstar 28i junior boiler in my flat, its about 7 years old and has never put a foot wrong apart from losing a bit of pressure over the course of the week. I've moved out of the flat and its been empty for about 8 months, boiler unused. Tried the Hot water at the taps today...
  8. M

    Worcester Bosch flue self tapers?

    Hi guys. Does anyone know where I can get hold of the self tapers for Worcester flue joints? Worcester want like £2.50 per screw. Just been to a local fixings place and they don’t have any. Any help would be great
  9. M

    Worcester Bosch sight glass issue?

    hi guys. I’ve heard about an issue with sight glasses on some of the Worcester’s but I’m unsure what the issue is. Any of you guys know anything about it please? What’s the procedure if you see one with a sight glass? Cheers guys
  10. A

    Worcester Bosch filter fitted too high?

    I have had a new 32 CDi Compact WB boiler fitted recently,along with a Greenstar filter. The filter has been fitted very high up, about 4-5 cm from the ceiling. Watching youtube videos, it seems the lid has to be unscrewed and the filter lifted out from the top. Can the filter be unscrewed (top...
  11. K

    Worcester Bosch Heatslave Green star 18/25 continuously locks out

    Since moving to our property in Dec 2017, the Worcester Bosch Greenstar 18/25 Heatslave, has had a recurring lockout problem, which 3 OFTEC engineers have not been able to diagnose/ resolve. Typically at night when on manual,with no hot water running and with NO HOT WATER demanded of it. The...
  12. G

    worcester bosch heatslave 15/19 oil baffle arrangement

    I didnt remove them, but when I went to replace them,they are kind of flat with trianglar shapes on them they seem to sit right in front of the flame. The handbook gives the order that they go in but Im sure they are supposed to be above the blast tube and not in direct line of fire. Ive just...
  13. A

    Worcester Bosch Greenstar 28i LOSING PRESSURE

    Hello. This is my first ever post. My boiler is just over 5 years old and started losing pressure a few days ago (daily drop of approx 0.5 bar). A Gas Safe Engineer carried out a full service. EV needed to be re pressurised and he said that all was well. A few hours later pressure dropped...
  14. M

    Worcester Bosch bonded washers??

    hi guys. Can anyone explain why Worcester use bonded washers on there gas connections rather than a normal fibre???
  15. C

    Nightmare time with Worcester Bosch repairs

    Hi Was wandering if anyone can tell me if a competent boiler repair man should be able to detect a leak on an isolation valve to the boiler fairly easily. Worcester Bosch repair men came out 10 weeks ago to repair what was a leaking left flow unit. They also took boiler apart and replaced a few...
  16. C

    Worcester bosch and Nest

    I had a new Worcester bosch oil boiler fitted a short while ago and then had a Nest thermostat fitted by a proper electrician and also put the app on my phone. I'm still a bit mystified how Nest operates.....sometimes it shows pre heating but even when it shows "heating in 1+ hrs" etc, it...
  17. D

    Worcester Bosch 35cdi leaking around main heat exchanger

    I'm looking for some advice please. My boiler seems to be leaking from the main heat exchanger. I've posted two photos. The first shows seepage of water from underneath the heat exchanger housing. In the second photo, I've removed the condensate trap and placed a towel to wick away the drips...
  18. O

    Worcester Bosch 25si

    hi guys, I was wondering what you guys replace when doing a service on a worcester boiler? I was going to replace the sparks, burner seal. Is there anything else I should be changing when doing a service? Is there something like a service kit like vaillant has got? What type of parts would...
  19. M

    Worcester Bosch 24i tepid water

    Hi We have a worcester bosch 24i 10 years old, the CH works fine everything looks ok with the boiler, the hot water though is tepid, this has just happened today. The diverter valve is operating correctly when you turn on the hot water tap on , so it is a mystery. Any ideas? Chris
  20. Peter J Brown

    Old Worcester Bosch 28i junior

    hi guys got phone call yesterday to go and look at a boiler fault, on arriving was informed that another company had been there three times in the last month. Was told that the first visit they checked all the electrical connections ie fan, air pressure switch and gas valve , the fellow said the...
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