OK bit of an odd one (for me at least)
I have a S plan system with hot water cylinder. Neither HW or CH is coming on, the thermostat/hot water call for heat, the relevant zone valve activates.... and then nothing happens. Pump doesn't come on, boiler doesn't fire.
Weirdly though, if I disconnect one of the zone valves (either one) then the system fires up normally.
So if I disconnect the CH zone valve, then the HW operates and the system fires up.
If I disconnect the HW zone valve, then the CH valve operates and the system fires up.
So both work as long as the other isn't connected. Both connected then neither works. Doesnt make a whole lot of sense to me
I have been away for a week, and the system has been inactive. I thought maybe one of the valves has stuck.. but clearly not.
I have a S plan system with hot water cylinder. Neither HW or CH is coming on, the thermostat/hot water call for heat, the relevant zone valve activates.... and then nothing happens. Pump doesn't come on, boiler doesn't fire.
Weirdly though, if I disconnect one of the zone valves (either one) then the system fires up normally.
So if I disconnect the CH zone valve, then the HW operates and the system fires up.
If I disconnect the HW zone valve, then the CH valve operates and the system fires up.
So both work as long as the other isn't connected. Both connected then neither works. Doesnt make a whole lot of sense to me
I have been away for a week, and the system has been inactive. I thought maybe one of the valves has stuck.. but clearly not.
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