CH Sensor, Drain down system before changing it ????

Discussion in 'Plumbing and Central Heating' started by colindj69, 27 Jun 2006.

  1. colindj69

    colindj69

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    Hi - I've got to replace the CH Sensor in my boiler, do I have to drain my system down before I do this ???

    Ravenheat 80t Combi Boiler

    Many thanks
     
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  3. ChrisR

    ChrisR

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    Do you mean the 820/20T ?
     
  4. colindj69

    colindj69

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    Nope, Ravenheat 24T - LS 80 T....
     
  5. ChrisR

    ChrisR

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    Yes you do.
     
  6. HarrogateGas

    HarrogateGas

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    No you dont, but you need to drop the system pressure
     
  7. ChrisR

    ChrisR

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    Fair comment, I was being economical...
    It's a wet sensor, which I felt was the point.
    But if you close the auto air vent, open a drain to let the pressure off, then take the sensor out, you probably won't lose any water to speak of.
     
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