Vaillant turboMAX plus 824E no CH

Joined
28 Oct 2008
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Location
Middlesex
Country
United Kingdom
Hello all.
I've got problem with this boiler. Everything is operating like it should, preasure is 1,5 bar. There is only one problem, CH is not working, temp. control for CH is set up almost to max, timer is also active - green control light is flashing near the timer. But CH is not working, status is showing S.30 - No heating demand from external controls. I don't have any external controls like thermostat or something just boiler itself. When i checked diagnostic mode for d.08 = 0, so also no demand for CH. When i setup boiler to work in sfH mode by pressing + and - together it's working well, as it should. But in norma circumstances i can't force this boiler to work...

If anyone have any clue or idea, i will be more than happy to fix that...
 
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You have no clock or roomstat? Check there is a bridge between terminals 3 & 4 on the pcb, there should be 240v.
 

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