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  1. H

    Worcester heatslave intermittent lockout

    Boilers been running fine since its last service in March but it went to lockout so I removed the front panel and found that the water pressure was just about zero. I filled it up to 1bar and pressed the reset button and she fired up OK but I noticed that the water pressure was rising a lot more...
  2. kris

    Worcester heatslave problems any oil engineers here

    Any oil folks in the here today. I dont hardly do oil as all gas here except country side etc ... anyway I've one customer I had problems with this boiler earlier in the year I changed oil pump and capacitor and that fixed that. Now I'm back again and when calling for heat it runs and runs...
  3. Inverness

    Worcester heatslave 2 18/25

    Hi guys, just back from servicing a 4 year old Worcester heatslave, the problem is when you call for heating at the controls it takes a long time before it responses? I take it you can't get hot water without having the storage heated ? I told the customer the boiler still under warranty so...
  4. D

    WB HEATSLAVE 18 25 losing pressure

    Hi all I am new to this forum so if I put in too much information please forgive me. I have a WB Heatslave 18 25 oil combi boiler. I have had it for a number of years. I know WB has a great reputation which is why I bought this boiler but it has been temperamental, to say the least. It has...
  5. 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...
  6. 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...
  7. M

    Heatslave 20/25 lockout

    Hi, My oil boiler has just locked out, pressed the reset button on the burner and it doesn't light and just locks out again after a minute. It has plenty of oil and has never run out. Tried calling an oftec engineer and no one can come for a week, I repair lots of gas boilers but not...
  8. G

    Worcester Heatslave II oil boiler

    This was installed new in August Its been working well but then I got this lockout code FO263 I tried pressing reset button but it didn't help so I turned the power off to the boiler for a few minutes then back on again and now I just have 2 short horizontal lines in the display. The...
  9. G

    Filling loop on Greenstar Heatslave ii 18/25

    Hi I’m trying to put more pressure into my external oil combo boiler (heatslave ii 1825) but can’t ring the filling loop The only thing I can see which looks like a braided pipe with 2 black valves is right at the back of the boiler so is pretty much unreachable. So I’m assuming that can’t be...
  10. M

    Wiring from 3rd Gen nest heat link to greenstar heatslave

    Hi, I have a worcester greenstar heatslave ii 25/32 external oil combi boiler and i am wanting to connect a nest 3rd generation and be able to control the hot water and also the central heating on the Y plan. It all looks very simple but on youtube Videos, it shows something different mainly...
  11. G

    Greenstar heatslave external 26/32 not starting

    Hi, Recently moved a radiator so drained the system to do this. I turned the power off on the boiler. 4 hrs later refilled the system and re-pressureised the boiler. Turned the power back on, circulating pump starts and then a minute or so later the burner fan starts. Fan keeps running for...
  12. A

    Worcester Heatslave 15/19 enquiry

    Hoping someone can answer this query. I am going to replace my expansion vessel on my Worcester Heatslave 15/19 oil fired boiler. I am fairly happy with most of the process my only query is within the instructions it says at the beginning to withdraw the boiler to prevent water ingress. But...
  13. M

    Heatslave 12/14 Bentone B9A problem

    Not sure if anyone can help me but I’m losing my mind over this. Went to service a Worcester Heatslave 12/14 that hadn’t been used for a few years. Ive had various problems, from the pump giving me 200 psi to the fan turning intermittently.... I’m at a stage where the boiler won’t fire at...
  14. S

    Worcester Heatslave 15/19 Combi Intermittent CH

    If anyone can give me some pointers it would be appreciated. I have a Heatslave that is having intermittent problems with CH, but the HW is fine. I ended up replacing the complete diverter so not just the head but whole body and also replaced afterwards the pump. The problem is some times the...
  15. S

    Worcester Heatslave 20/25 Lockout

    Hello! I am new to the use of oil based boilers and seem to be having a problem with the current one I have (Worcester Heatslave 20/25) The hot water is running fine, it will supply on demand when the settings are correct but the problem currently lies with the central heating. When I put the...
  16. G

    Worcester Heatslave II how to turn off DHW

    I have recently had a Worcester Heatslave II 18/25 combi installed in my kitchen After installation I told the installer I don't use the hot water and how to turn it off to save energy. He said just put it into Eco mode but not to turn down the DHW temperature on the boiler. I have read the...
  17. S

    Heatslave 26 32 RS Balanced Vertical Flue

    Hi Folks, I'm trying to track down a Heatslave 26 32 vertical balanced flue to replace/extend our existing horizontal flue. I have a local engineer who is happy to do the work but didn't want to do the leg work finding a flue which is no longer made. I'm waiting to hear from Worcester Bosch...
  18. R

    Worcester Bosch Heatslave 20/25 oil hose size

    Worcester Bosch Heatslave 20/25 oil hose need to pick one up from my local plumb merchants and hes asking what size connectors male female etc does anyone know the spec i require thanks
  19. Inverness

    Worcester heatslave 2 exterior combi

    hi guys I went to breakdown today. The boiler fault code was 219 e9 saftey temperture too high? How do you fix this and would this happen? I reset it and everything is bk to normal bk then it went bk to the fault code.
  20. J

    Help needed on Worcester heatslave 20/25

    I have a Worcester heatslave 20/25 and it stopped working the other night. When I switch the boiler on at the wall the blower starts to run but won't ignite I have a oil feed to the pump but no oil feed to the nossle then the blower cuts out after 20 seconds my lock out light is not on and no...
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