Vaillant ecotec faulty no hot water and heating PCB needed replacing UK Birmingham boiler repair - YouTube
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Watch this video HOW to test a boiler / PCB Before any work is done on any boiler you should do this 4 Part test. Our yellow (easy to follow) FAULTS...
VAILLANT ECOTEC PLUS 824 831 837 & ECOTEC PRO 24 28 CIRCUIT BOARD PCB 0020132764 | eBay