The auxillary heater code ......... has the extra water pump been fitted on the thermo top aux heater .
Can you set the timers so it comes on in a morning ?
I did the aux heater mod on mine so i can have them on the timer, and i have that code..... the company data bus one .
It works fine so i never really looked into it but i think its just the level of communication not quite in sync between the modules .
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