Replacing old controller and thermostat with wireless Tado. No access to wiring centre.
Hi, I am looking to replace my old Honeywell ST6400C controller and Honeywell wired thermostat with a Tado V3+wireless thermostat starter kit.
I have a Worcester Greenstar 24i system boiler.
Unfortunately due to thoughtless installation, the wiring centre is inaccessible without removing the boiler.
I was wondering if I will still be able to replace this without wiring centre access.
Below is the wiring I have available in the controller.
Any guidance would be appreciated.
Best Answer
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Yes, you can replace your programmer with the wireless receiver without needing to make any changes to the wiring centre. Based on your current wiring the system is "Y-Plan".
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Answers
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Thanks, this is really helpful.
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I have exactly the same setup and replaced the ST6400C controller + Wireless Honeywell Thermostat with the TADO Wireless Receiver using the same wires as per the previous Y plan wiring - like for like. However the Boiler is NOT coming on. All the TADO devices are registered on the network and working fine along with the app. The 2 x TADO thermostats are registering the temp.
The HOT water is coming on for the Hot water tank,via the Wireless Receiver ( as per the UK setup ) but NOT the central heating?
Any suggestions?
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@WATTIE60 What have you done with the wiring in the receiver for the Honeywell wireless thermostat? The CH thermostat wiring will usually need to be bridged.
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Hi, thanks for getting back, I have detailed the wiring on this thread.
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