Recent content by hertsboilers

  1. hertsboilers

    Vaillant boiler pressure

    Check the smaller head tank for water in the loft if you don't have a pressure gauge and filling loop.
  2. hertsboilers

    Suspected Baxi 105e diaphram issue

    105e or Instant 105e?
  3. hertsboilers

    Vaillant Ecotec 624 + Unistor tank + Tado =???????

    Providing the new boiler isn't far away from the cylinder. It is a good choice but there is nothing wrong with Vaillant vSMART which is a weather compensated control to modulate heating.
  4. hertsboilers

    Vaillant EcoTec F76 Fault code

    I referred one for Vaillant fixed price repair early this week, the customer was told the same thing as OP, it is a contract with Domestics and General. It seems better than Vaillant own package, so the customer went to 6 month contract by £50. The local Vaillant engineer turned up on the second...
  5. hertsboilers

    Potterton Promax SL Problems

    More like a circulation problem.
  6. hertsboilers

    Viessmann 200w with Multi Zones

    Viessmann 200-W, a flagship boiler with 20/1 modulation ratio, is beyond most of heating installers. As far as I know it will work with Tado radiator TRVs but don't know others. Do some home work and call a Viessmann expert installer.
  7. hertsboilers

    Do I need a new boiler?

    @Gasguru and @muggles dose this model have a filter in? F9 is the same as F75 on Vaillant.
  8. hertsboilers

    Yet Another Nest Learning Thermostat Gen 3 HELP!!!

    Well, you wish to get a help from scratch?
  9. hertsboilers

    Worchester Bosch DT10RF to Nest/Pre-heat

    His wiring is still working.
  10. hertsboilers

    Replacing CH Programmer

    975 3 to 715 1 975 1 to 715 3 975 4 to 715 4
  11. hertsboilers

    Worchester Bosch DT10RF to Nest/Pre-heat

    Yes. Can't set pre heat from Nest
  12. hertsboilers

    Replacing Tank Stat????

    "ATC on the right, numbered 3(NO) - 1 (Com) - 2(NC) + earth (also left to right)" Should be the same connection, ie, 1 to 1, 2 to 2 and 3 to 3.
  13. hertsboilers

    Nest+need new opentherm wiring (keep existing programmer?)

    I am going to spend some time to read Evohome now.
  14. hertsboilers

    Nest+need new opentherm wiring (keep existing programmer?)

    More about comfortable heating than gas bill saving. Also from the internet some installers suggested Nest isn't good on Opentherm.