SAECO INCANTO HD 8917 Repair control board Triac/fuse, error message 15, 2/3 coffee machine
Is your Saeco Incanto HD 8917 heating continuously, producing excessive steam, or displaying error message 15? In this second part of our video series, we'll repair the control board, replace the blown triac and the fuse, and show you how to prevent dangerous short circuits! ☕❌🚨🚰🔌⚡🪛⚙️🔄🛠️📈
Scroll down for English version!
If the coffee machine starts heating immediately and continuously when plugged in – even before it's switched on [00:24, 00:44] – this is usually due to a defective power transistor (triac) on the circuit board. This has a permanent continuity [01:40, 06:32] and continuously supplies the boiler with power until the thermal fuses finally trip at 175 °C to prevent further damage [00:56, 23:35]!
I'll guide you through the challenging circuit board repair and show you each soldering step:
Replacing the triac (tip for more power): We desolder the original, overloaded triac (T620, 12A) from the heatsink [05:47] and replace it with the more powerful model BT139-800 [06:04]! It's identical in construction but can handle 16A instead of 12A [06:07], thus offering significantly greater protection against thermal overload in everyday use.
I'll take you through the challenging circuit board repair and show you each soldering step. Changing the fuse (avoid the trap!): A wiring error on my part at the boiler caused a nasty short circuit that blew the main fuse and made the display go completely dark [11:07, 11:31]! My urgent advice when buying: Make sure you get a miniature fuse with pre-attached solder wires! Since I had bought regular fuses without wires, I had to painstakingly solder wires from an old circuit board [14:38, 14:56, 17:00].
Circuit board wiring made easy: Don't be intimidated by the tangle of wires [21:00]! The Saeco Incanto connectors are keyed, so almost no plug will fit incorrectly into another socket [21:12]. I'll explain the wiring of the ground connections [21:55] and how the gray and black wires are connected via the 175°C safety thermostats [23:29].
Since I do everything myself, there isn't much time to get everything perfect – but this video provides you with the most honest, unvarnished, and absolutely practical instructions straight from my workshop. Learn from my mistakes and give soldering a try!
If you have any questions about the triacs, fuses, or the soldering process, feel free to ask them in the comments! :)
🔧 HIGHLIGHTS IN THIS REPAIR VIDEO (PART 2):
Cure Error 15 & Continuous Heating: Triac Diagnosis via Continuity Testing [00:56, 01:40].
Installing the BT139-800 Triac: Increased Lifespan Thanks to the 16A Upgrade [06:07].
Soldering & Fuse Hack: How to Modify Miniature Fuses in an Emergency [14:56].
Preview of Part 3: In the next video, we'll reassemble the cleaned machine and start the big live test!
🇬🇧 ENGLISH DESCRIPTION:
Is your Saeco Incanto HD 8917 heating up continuously, generating heavy steam, or throwing Error 15? In this Part 2 of our repair series, we are diving deep into circuit board diagnostics, desoldering the blown heating triac, replacing the blown safety fuse, and showing you how to avoid costly wiring errors [00:00]!
If your espresso machine starts boiling the water loop the very second you plug it into the wall socket – before you even press the power button [00:24, 00:44] – your board has a shorted power transistor (triac) with permanent electrical continuity [01:40]. This forces the boiler to overheat until the 175 °C thermal safety fuses trip to prevent a fire [00:56, 23:35].
Key steps and component upgrades featured in this tutorial:
The Heavy-Duty Triac Upgrade: We desolder the weak, short-circuited OEM triac (12A) from its aluminum heatsink bracket [05:47] and replace it with a heavy-duty BT139-800 core [06:04]. It shares the same footprint but handles 16A instead of 12A, providing a much better thermal buffer [06:07]!
The Fuse Pitfall: Due to a wiring mix-up at the boiler during my first tests, I caused a short circuit that blew the main fuse and left the display completely dead [11:07, 11:31]. My urgent workshop advice: Make sure to buy glass fuses with pre-attached wire leads! Because I accidentally bought standard fuse caps without leads, I had to tedious-weld jumper wires from an old donor board [14:38, 17:00].
🌐 Visit my online shop for handy gadgets, tools & channel support:
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🧰 Useful components & links from the video:
🔗 Triac BT139-800 (Conrad): (Link in the video description)
🔗 12A slow-blow fuse (Conrad): https://www.conrad.at/de/p/tru-compon...
🧰 Wolfcraft 31-piece combination security bit set: https://www.amazon.de/dp/B000P3BOCK
🎬 Additional tutorials on my Channel:
🎥 Completely disassembling, cleaning & greasing the Saeco brewing unit: • Kaffee schmeckt nicht? Brühgruppe richtig ... .