Our recently installed (last week) Vaillant Ecotech 832 Plus does its own thing and heats constantly regardless of the controller mode temperature, manual ON/OFF controls etc..We have the Honeywell T3 wireless controller with wall unit, system heats the radiators even when the controller is switched OFF!
I have checked the wiring of the wall unit and it is correct. Also the "run" (RT) signal from the controller into the boiler PCB is correct (i.e. 230V when wireless controller is set to manual "ON" and room temperature is below target, and approx 0V when unit is set to "OFF" or room temperature is above target! i.e. the output from the controller is working correctly, but regardless of the "Output" or "Run" signal, the boiler just heats the radiators anyway! The flow temperature is displayed and the radiator symbol flashes - not permanently, but it is heating the radiators enough for some of them to be very hot! Am I missing something? Is there some link or setting on the PCB which needs to be changed? Thanks!
I have checked the wiring of the wall unit and it is correct. Also the "run" (RT) signal from the controller into the boiler PCB is correct (i.e. 230V when wireless controller is set to manual "ON" and room temperature is below target, and approx 0V when unit is set to "OFF" or room temperature is above target! i.e. the output from the controller is working correctly, but regardless of the "Output" or "Run" signal, the boiler just heats the radiators anyway! The flow temperature is displayed and the radiator symbol flashes - not permanently, but it is heating the radiators enough for some of them to be very hot! Am I missing something? Is there some link or setting on the PCB which needs to be changed? Thanks!
