Boulter Camray Combi 70A

[NickRCarter]

Hi, Got a call out to what was described as a programmer problem. Burner operates correctly as does the DHW. When system is operating in heating mode, burner fires correctly and pump runs......radiators get hot. When the boiler thermostat is satisfied, burner stops and so does the pump........radiators then cool down as pump not running. Boiler cools. thermostat then kicks in, burner fires, pump comes on, radiators get hot and so on.

Any clues as to the fault? Spoke to Worcester Bosch technical for quite sometime without a definitive answer except it could be the board. Unfortunately the wiring diagram on the Worcester Bosch site is incomplete.

Any sensible suggestions?

Thanks,

Nick

 

[Billy Bob Bob]

sorry nick i may be missing the point,are you saying theres to long a delay before kicking back in to ch?

 

[NickRCarter]

No, it's just there is no circulation of water in the system unless the burner is firing.

 

[Billy Bob Bob]

suppose it could be a pcb or wiring issue,WHEPS a member on here knows his oil boilers as do a few of the other lads so a better answer may come along shortly

 

[ecowarm]

I would say its the PCB and not the programer problem

 

[NickRCarter]

Yes, I dismissed the programmer. The problem is the board is an expensive item so I need to be sure.

 

[ecowarm]

Without being there with electrical test equipment nobody could be certain