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The pin-headed(?) adjustable valves that had existing dumb TRVs fitted required some extensive percussive maintenance and plusgas prior to fitting the tado TRVs (just to get everything moving smoothly again). Fitting a new adjustable valve in my office took very little time and cost ~Β£80 (from memory).
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Thanks. It all went swimmingly for some reason, TRV pins were alright. And apparently Toolstation is now out of stock on the 4-pack Smart TRVs so they sent me 4, not 8... (Had to order a 3-pack from amazon, which is fine)
The programmer install part took about an hour, luckily the wiring diagram was spot-on with our old Honeywell (just the wires were swapped L-R, and bottom-up entry...) I resisted the urge to install the device upside-down and installed it slightly on top of the old "hole". I now have a third-covered 1-gang-sized hole (single core cables come from there, construction vibes) on which I will get and cut a blanking plate to fit, tomorrow.
TRV install was a bit faffy to begin with but got the hang of it after the first two.
Not to be off topic: Home Assistant immediately detected both the cloudy-Tado and the Homekit-tado, setup was easy. Didn't like the Tado UI but it'll do I guess. Still have to convince my SO to install the app.
disq
Speaking of, picked up Tadoβs today after being bothered with various heating shanenigans past few weeks. Toolstation had a slightly better deal than Amazon, ordered Programmer with hot water (weβre a βY planβ apparently) + wireless thermo and 8x smart TRVs. Will DIY the install but still need somebody to replace some valves later on (probably next week) as rooms upstairs plus my office are all dumb valves. Canβt be sure how well my current TRVs work, might need some fiddling. Hope it goes ok.