Baxi Solo HE No Hot Water

Baxi Solo HE no hot water, but heating coming on when hot water is set to be on. Set hot water on and turned cylinder thermostat up, the pump runs but the lever on the Honeywell three-port motorised valve stays in the central heating position.

Look at wiring in junction box. There is power at the orange wire and white wire. The heating is not set to be on and there is no power coming back through the room thermostat. There is power to the cylinder thermostat from the timer. Turn down the cylinder thermostat, the pump stops, and there is power at the grey wire to the motorised valve. The valve stays in the central heating position. I force the mechanism back to the hot water only position, and turn the cylinder thermostat up. The valve stays in this position and the pump and boiler run for hot water. There is no longer any power on the white wire from the motorised valve.

Motorised valve is replaced and the system is tested and running fine.

Disclaimer: The works described in this blog are a record of work undertaken and should not be taken as guaranteed to solve your problem. Work should only be carried out by persons qualified and competent to do so.