Relay Board

Marsoni

M251S

$108.71

Get it in 3 business days with 1 day shipping. Friday, May 29

Relay BoardPart number: USA8990025 Regular price: 178. 43 Availability: In Stock Made by: Bosch Manufacturer's Part Number: 00489264 Description Relay Board USA8990025 Replacement Reference and Model Information Part Number 00489264 1052507, 489264, 830024, AH3471874, EA3471874, PS3471874, PS8722133, AP3194292 Manufacturer Model Number Description Bosch HBL645 Bosch HBL455 AUC (FD 8202 ) Bosch HBN642 Bosch HBL555 Bosch HBL646 Bosch HBL655 ELECTRIC BUILT IN OVEN

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This is my second 51mm machine. I never used the included handle or basket… I kept my existing HUGH IMS precision basket and bottomless portafilter. The temp and preinfusion are set and not adjustable but fine (reduced variables). I defeated the shut off by volume by setting higher than needed (wish that was easier to turn off). I like to manually shut off when I hit 30g on my scale. The machine will drip since there is not solenoid valve so I just pull the scale from the try when mouse tail breaks and drip starts. The steam wand and hot water dispenser is a massive upgrade (from Capresso EC50) and the real reason for my upgrade. I would have paid $50-100 more for the improvements listed… but I guess most people would not so this is about the best option for me with 51mm (keeping all the 51mm three lug portafilter stuff I own). 5 stars = for me and the price

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Reviewed in the United States on April 18, 2026