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Hello,
I bought 3 thermostats from Aliexpress, model BHT-002 GA as it should have fit underfloor water heating.
The problem is, all 3 of them do not work. They work as if, the display is operative, but when the heating is on, it does not short contacts 1&3. I hear the relay clicking. I checked with multimeter, there is current on 3&4 but never on 1&3.
For the wires on the wall: green is L, blue is incoming N, brown goes to N wire on water pressure valve. The second wire on each valve goes to L directly. So if i short brown & blue on a wall, valve corectly opens, so the wiring is fine. The valves are NC (normally closed).
The strange thing is that all 3 thermostats do not work, so its really strange.
Do they seem defective? Or I bought incorrect model?
I bought 3 thermostats from Aliexpress, model BHT-002 GA as it should have fit underfloor water heating.
The problem is, all 3 of them do not work. They work as if, the display is operative, but when the heating is on, it does not short contacts 1&3. I hear the relay clicking. I checked with multimeter, there is current on 3&4 but never on 1&3.
For the wires on the wall: green is L, blue is incoming N, brown goes to N wire on water pressure valve. The second wire on each valve goes to L directly. So if i short brown & blue on a wall, valve corectly opens, so the wiring is fine. The valves are NC (normally closed).
The strange thing is that all 3 thermostats do not work, so its really strange.
Do they seem defective? Or I bought incorrect model?
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