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  1. D

    Need advise on how to decommission a wired Honeywell programmer ST699

    Hi I have a Honeywell ST699 programmer which is working fine but I want to learn how to decommission it (disconnect it from the rest of the system). Currently I have a Honeywell Home Single Zone Thermostat (Y87RF2024) and I am thinking to get the Honeywell Home Mobile Access Kit RFG100 to get...
  2. N

    Honeywell ST699 switching fault

    Honetwell St699, will switch on in once mode at desired time but won't switch off at desired time will just continue, any ideas would help greatly
    • Nobby1924
    • Thread
    • america fault honeywell st699 switching usa
    • Replies: 6
    • Forum: USA
  3. M

    Honeywell ST699 Programmer Problem

    I have a System boiler with a programmable room stat and a still very common Honeywell ST699 basic programmer - ten years old. I know that this crosses over into an ‘electrical’ issue but would appreciate if anyone could tell me if anyone has seen this fault and if it shows shows it is faulty...
  4. moonlight

    Honeywell ST699 Replacement

    Hi All, Just wondering if anyone knew what would be the best replacement programmer for the Honeywell ST699? Other than like for like. My customer has a y plan system. Useful if the back plate matched. I don't want a pack just the programmer. Thanks
  5. C

    Honeywell st699 heating problem

    I have lived in my rented property for about 18 months and recently the heating will come on even though the switch is set to off. I will call landlord to have a look I just wondered if it could be something I'm missing before I ring him for someone to look at it. I've never noticed this...
  6. V

    honeywell st699 problem

    Hi my friend today changed his programmer for his boiler as it kept on tripping the fuse and not turning on it was also burnt on back and smelt so wasn't good .so swapped it like for like for another Honeywell st699b programmer after doing this his boiler will not fire up he says the pump is...
  7. C

    ST699 contoroller replacement

    Hi All, I tried to replace an old ST699 controller for a CT9400C but there's about 8 terminal connectors on the ST699 and 5 on the CT9400C, any advice for an alternative controller? .. current system is 'conventional and Y plan
  8. M

    Very odd Baxi Solo / Honeywell ST699 problem - won't turn off hot water - replace?...

    Hi and thanks for looking at my (first) post :) We bought a house that had not been used for a couple of years, the boiler was not working and the wires had been disconnected, so we replaced a few parts on it, rewired it, and connected it all together to get it working again. Details of the...
    • M2RTY
    • Thread
    • baxi boiler honeywell hot hot water problem replace st699 timer turn off water won't
    • Replies: 6
    • Forum: Plumbing Jobs | The Job-board
  9. S

    Honeywell Timer setting.

    hi guys, wondering if you could help as i seem to be lost.. just bought a house, im going to do it up over time but for now getting a combi boiler is the least of the things it needs.. it currently has an old Honeywell heating system which has a timer, but i cant figure out how to set the...
    • Steven Williams
    • Thread
    • boiler central heating system combi combi boiler heater honeywell hot hot water setting st699 system timer water
    • Replies: 2
    • Forum: Plumbing Jobs | The Job-board
  10. M

    New boiler parts

    X2 pumps £25 each x4 carbon monoxide alarms £17 each 1 potterton programmer ep2000 £50 x2 22mm mid position valve honeywell £40 each x1 one valve actuator myson 322 £20 x1 22mm mid position valve drayton £40 x5 3 way valves £40 each x3 honeywell cylinder stat £25 each x3 drayton room stat...
    • manmade
    • Thread
    • 22mm boiler cylinder drayton electronic new boiler oil parts potterton st699 valve valves
    • Replies: 0
    • Forum: Plumbing Jobs | The Job-board
  11. P

    programmer swap no no hot water!

    Hi all, I've just swapped over programmers from my defunct honeywell ST699 to their ST9400C. My system includes a V4073 mid position valve and an L641 Cylinder Stat. The instructions showthe replacement wiring from one unit to the other which i have followed. Problem! The CH, lights up on the...
    • Paul Thompson
    • Thread
    • boiler central heating system cylinder fix hot hot water no hot water power problem programmer replacement safe safety st699 switch system timer valve water
    • Replies: 11
    • Forum: Plumbing Jobs | The Job-board
  12. M

    New boiler parts for sale x4 fan heaters £10 each x6 pump valves 22mm £3 each x1 hone

    X4 FAN HEATERS X6 PUMP VALVES 22MM X1 HONEYWELL ST699 24 HR PROGRAMMER X2 HONEYWELL L641 CYLINDER STAT X2 SELECT 107XL TIMESWITCH X1 DRAYTON LIFESTYLE ELECTRONIC PROGRAMMER X3 DRAYTON ROOM STAT X3 HONEYWELL CYLINDER THERMOSTAT X5 3 WAY VALVES X1 22MM MID POSITION VALVE DRAYTON X1 ONE...
    • manmade
    • Thread
    • 22mm boiler cylinder drayton electronic fan for sale heaters new boiler oil parts potterton price pump sale st699 valves
    • Replies: 0
    • Forum: Plumbing Jobs | The Job-board
  13. H

    Need help downstairs rad problems

    hi everyone i just wandered how comes my rads downstairs r struggling to come on even though i have changed the pump and changed the two gate valves at the top and bottom of the pump.I have turned all the vales on both sides off upstairs.the downstairs radiators i opened the LSV fully on one...
    • hiretools
    • Thread
    • airlock boiler central heating system copper cylinder downstairs header header tank help hot hot water loft pressure problem problems pump radiators st699 tank valve valves vent water
    • Replies: 3
    • Forum: Plumbing Jobs | The Job-board
  14. M

    Can st799 plug replace st699

    Hi all, I know that a ST799 has the same backplate but I wanted to know if the wiring is significantly different of just a change to the push on cover for the 7 day timing and the electonics and wiring on the back plate are the same. My st699 loses memory when the power goes off and rather than...
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