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Further to earlier posts on the JLWM1203 failing to start, I also went down the route of replacing the door interlock because the door wasn’t locking. That wasn’t the issue. Speedojames posted a link to the service manual, which helped enormously, as the machine will run self-diagnostic tests. E51 was displayed, which indicated “motor power triac short-circuited”. I located the triac which abuts the heat sink. It didn’t look burned, but since several postings had suggested it may need replacing, I followed that course. Like Begood_John, I was a bit apprehensive about removing the PCB, but by photographing each stage and proceeding with care, I removed the facia, unplugged all the sockets from the PCB and edge connectors, removed the four screws holding the PCB and unclipped it. The fitted triac in my WM had no identification numbers, so many thanks to those who correctly identified it as BTB 16-700BWRG. I bought three from Farnell; also a vacuum desoldering iron (Amazon), a fine tip soldering iron (Toolstation) and a tube of Servisol heat sink compound (Ebay). Today I installed the new triac, testing the soldering, reassembled it all. The machine is again working properly. Many thanks to all who have posted on this issue – I could not have repaired it without your information.
