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bosch

Robert Bosch GmbH (; German: [bɔʃ] (listen)), commonly known as Bosch, is a German multinational engineering and technology company headquartered in Gerlingen. The company was founded by Robert Bosch in Stuttgart in 1886. Bosch is 92% owned by Robert Bosch Stiftung, a charitable institution.Bosch's core operating areas are spread across four business sectors: mobility (hardware and software), consumer goods (including household appliances and power tools), industrial technology (including drive and control) and energy and building technology.

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  1. J

    Bosch CDI 30 combi boiler

    Hi, my boiler has been having an intermittent fault no one can seem to cure. When the hot tap is used , usually first time in the morning, it creates the boiler to over heat. I have to wait for it to reset itself and cool down then usually ok. Apparently not heat exchange plate.
  2. 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...
  3. 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...
  4. 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...
  5. D

    What is this error code on Bosch combi boiler?

    I've been having problems with my boiler since I moved house. Today my Hive thermostat was offline, then it recovered but after that my boiler's central heating had problems starting. I've reset the boiler AND turned it off/ on and despite that I am getting the above error - which I cannot even...
  6. 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...
  7. M

    Worcester Bosch bonded washers??

    hi guys. Can anyone explain why Worcester use bonded washers on there gas connections rather than a normal fibre???
  8. 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...
  9. 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...
  10. 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...
  11. 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...
  12. 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
  13. 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...
  14. M

    Worcester Bosch Controls

    I have a Greenstar Comfort 11 RF controller and I am trying to set the holiday function.The problem is, at the end of the setup procedure do I leave the controller in the OFF position or the Auto position? I ask this because if it's the OFF position one can't set it until your about to leave...
  15. david stanton

    worcs bosch 24i to 34/38i ?

    i've got a worc 24i at 9l which is about 5 years old, from reading specs the only difference on the 34/38i is the litres flow rate, i'm presuming this is just one part in there that makes the difference? Can a 24 be "converted" to a 34/38 with some swap of a part, so I can get a much better...
  16. P

    Worcester Bosch Greenstar 30 CDi Conventional Boiler

    Hi All, I have the above mentioned boiler linked to a Nest Thermostat. The problem I have is when the boiler is set to No.5 which heats the water to circa 67 degrees, it reaches temperature, the gas light goes out and it cools down to circa 30 degrees then heats back up again. This continues...
  17. B

    Short cycling Bosch Worcester 30CDi Greenstar - Bypass Valve?

    My first post, so apologies for any incorrect terminology I had a Bosch Worcester 30CDi Greenstar Classic Regular Boiler installed in 2014. The Boiler is used in a vented S-plan system, with two motorised valves, a manual Bypass Valve, a British Gas (Grundfos) Multi-head pump, Hot Water...
  18. N

    BOSCH RD 532i Pressure & Temp faults

    Hi all, I have a Bosch rd532i and recently it's started to develop various faults. It keeps overpressurising when not in use overnight, leave it on 1.2 bar and 12-14 hours later it's on 3-4bar. I have removed the pressure each time immediately though the relief valve. Secondly, when the...
  19. D

    Worcester Bosch 28i series 2 not heating radiators

    Hi, I have a microbore heating system with the above boiler, now 18 years old. recently, I had 3 radiators replaced and all worked fine for about 3 weeks. Now however most of radiators are only getting warm, some hardly at all. The pump is running and the whole system has been bled and topped up...
  20. Mikesaint

    Worcester Bosch Greenstar 12 Ri yellow cap

    Hi, anyone able to assist naming and tracking down a part for this boiler. It's between the 'mains cable inlet' and the condenser drain. It has a yellow plastic screw on cap which has split and is leaking. Seems a simple part to replace but I can name or find it on any parts site Thanks

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