Error code reference
Kees van der Westen machines rarely throw numbered error codes. They tell you something is wrong through the PID display, the feel of the paddle and joystick, and the quality in the cup. This page covers the service triggers we see most on the Spiritello, Speedster, Spirit, Slim Jim, Slim Jim Idrocompresso, and Mirage.
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About these codes. Compiled from Kees van der Westen product research and our own service logs from specialty cafe calls. Updated July 2026
The temperature reading has stopped telling the truth: either the NTC sensor is failing or steam migration has corroded the controller board contacts. On the Mirage and Spirit, the PID display usually flags this before the pour quality does.
One group is running its own race. The Mirage gives every group an independent brew boiler and PID, so scale, NTC sensor drift, or a controller offset can pull a single group out of sync while the others stay stable.
Long heat-up, weak steam at the wand, and a pressurestat or PID that cycles without settling all point the same way: scale. Toronto water gets there eventually, even on softened machines.
No numbered code for this one; the machine tells you with drips down the diffuser or steam venting during pre-infusion. Group gaskets simply wear out under thousands of portafilter lock-ups.
A brew lever that catches mid-throw, or a pre-infusion ramp that feels rough, means the PTFE bushings in the paddle linkage have worn or dirt has worked into the pivot. It's the classic wear signal on the Mirage and Speedster.
The Mirage Idrocompresso drives its pressure profile from a sealed hydraulic chamber, and when the chamber seals wear, the profile flattens or the pre-charge bleeds away. Only the Idrocompresso shows this fault; no other Mirage variant has the chamber.
A flat ramp, a missed start, or a curve that no longer matches the profile your bar dialed in: line-pressure pre-infusion depends on inlet pressure and brew solenoid timing, plus the needle valve on Idrocompresso machines.
A joystick that catches mid-throw or returns slowly has worn its pivot bushing, which is what high-volume steaming does to it. Common across the Mirage, Spirit, and Speedster.
No controller alert here either: the warning is the wand's surface getting hotter during steaming. A cracked or shifted inner sleeve has closed the insulating gap in the double wall.
The gauge gives this one away: pressure that won't reach 9 bar under load, or sags during the shot, means rotary pump wear or a drifted OPV.
Custom cabinetry hides the source of a leak better than a standard frame would. The usual culprits are the boiler manifold, a brass fitting weakened by scale, or the cup-warmer drain routing.
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FAQ
9 answers about resetting codes, recurring faults, firmware versions, and when DIY ends.
Updated July 2026
Every documented Kees van der Westen fault we see is listed above, with its meaning, common causes, and what to try before calling a technician. If the code on your machine isn't on this page, call us with the exact display string and we'll work it out by phone.
Sometimes. Many Kees van der Westen codes clear after a power cycle, a completed descale, or a counter reset through the service menu. Codes tied to a hardware fault (failed sensor, blown element, board issue) will return immediately and need a technician. Each code above lists what's safe to try first.
A code that returns after a power cycle is signalling a real fault, not a glitch. The underlying part (sensor, heating element, valve, motor, board) needs replacement. Repeat codes are diagnostic gold for us, so call with the exact code and any timing or symptom pattern you've noticed.
Kees van der Westen updates fault tables across firmware revisions and model generations, and not every code is documented publicly. We see codes in the field that aren't in any published list. Call us with the exact display string and the model and we'll work it out from our service log.
Most calls in Toronto and the immediate GTA get same-day on-site response when scheduling allows. Tell us the code and the model when you book and we'll bring the right parts on the first visit so the repair finishes the same day in most cases.
No. We're an independent service provider, not affiliated with Kees van der Westen, and we work on machines outside the manufacturer's authorized network routinely. That independence lets us service older or out-of-warranty machines authorized networks may decline, and quote transparently every time.
Depends on the machine, the code, and the cost. We give you honest math on this. If repairs are starting to exceed roughly 50% of a refurbished replacement and multiple major systems are throwing codes, we'll tell you it's time to look at replacing rather than running up the repair bill.
If your machine is under the manufacturer's warranty, independent service may affect coverage depending on Kees van der Westen's specific terms. Try the manufacturer's authorized network first. If their response is slow or they decline coverage for your code, call us and we'll service it on standard terms.
11 codes are documented above, organized by the system they affect. The list is compiled from manufacturer service literature, technician forums, and our own service log. We update it as new codes appear or firmware adds new states.
What we've done
Brought us in for an emergency steam wand failure on a Friday afternoon. Same-day fix, fair quote, no premium for the rush.
We diagnose Kees van der Westen codes by phone routinely. Same-day on-site dispatch if it needs hands on the machine.
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