Vaillant 831 ecotec plus

Got several second hand Vaillant programmers in the garage... They are as Alec says very good.... Or would be if anyone could work them..... Fit a nice logical Honeywell programmable room stat... and never look back
 
I've just ordered the new 350f they say its user friendly now and I'm already used to the programmer that's in the boiler so can't be that much harder than that.....
 

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