Free repair help
We have 46 questions about mending '401' in category Heating, Home Heating Systems
Vaillant ecotec 831 plus?
Thorn Harcal 460?
Have I got got a faulty programmer?
Fan tries to run every 15 seconds then stops immediately?
Ideal Isar H30?
Remove boiler cover?
Boiler cycle?
How do I work my Storad storage heater?
Greenstar Highflow 440?
Boiler problem?
Remove cover off gas boiler?
Firebird super Q 50/82?
Siemens RDJ10RF thermostat problem?
How to fix my fireplace?
Worcester boiler dripping water?
F40 fault?
Canon caress 2000 gas fire?
Valor petrus 850 electric fire?
Morco gb 24?
British Gas 532/i Gas Combi Boiler?
Power but not activating Baxi 105e boiler?
Worcester Bosch 532/i Combi Boiler?
Britony Combi Se boiler 40 & 80 lights flashing?
Advice?
Reset my worcester dt10rf programmer?
Myson Touch?
Vaillant F22 fault?
BMU error code?
Greenstar 25 combo boiler?
How can i mend my baxi combi 105a?