Lou asked ... Mac Allister 35cm electric lawn mower?    |    Ronald Charlwood asked ... Beko fridge/freezer not cold enough?    |    John Broadbent asked ... Advise?    |    suzy asked ... Brother kh-940 not in sync with DAK9 in interactive knitting?    |    Susan asked ... How can I stop my steam iron spraying water with the steam?    |    Click here to ask your question

vaillant ecoTEC plus 428 displaying fault 98?

Hi - We cannot get the central heating to work however the hot water and underfloor heating in the kitchen is ok. We have checked the pressure in the boiler, bled the radiators and also replaced the batteries in the thermostat. Not sure what to do?
DC, October 2012
Has room start has power check 4and5 terminal got power in PCB to find out that on signal coming from from start link 4and5 with piece of wire if OK than98code flow or return sensor is blocked

ltd, October 2012
link Click here to see other fixes for Vaillant.