Dual boilers, one job: pour
An RE Doppia with wandering brew temperature undoes the very thing you bought it for. We repair the platform end to end: brew boiler descales, transducer recalibration, TFT firmware reflashes, flow meter cleaning, group service. Describe what the display is showing when you book and the likely parts arrive with the technician.
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Rocket Espresso · Dual-boiler commercial machine with TFT controller
The RE Doppia is Rocket's true dual-boiler: a PID brew boiler and a steam boiler running at the same time. It feeds pre-heated brew groups, doses volumetrically, and puts everything on a 4.3 inch TFT touchscreen with USB updates. The dry-steam pathway heats the steam route so the wand spits less condensation into the milk. Restaurants and mid-volume cafes run it as the step between HX simplicity and the multi-boiler flagships, and on the bench the TFT does half the talking: most faults announce themselves on screen.
Why Grajqevci
Call in the morning and a technician is usually on-site before the day is out. Most Rocket Espresso RE Doppia jobs get diagnosed and fixed on the first visit.
Commercial coffee equipment is all we do, and Rocket Espresso RE Doppia is one of the platforms we know best. Not a generalist guessing at a service manual. Genuine OEM parts, industry-standard procedures.
Flat rate for the visit, with parts billed separately. For bigger jobs you'll see a written quote on-site before we proceed.
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RE Doppia faults we diagnose
These are the RE Doppia faults we actually get called for. Each one lists the likely cause and how the repair plays out.
The pre-heated groups draw their stability from the brew boiler's heat path, and scale along that path starves them. We descale the brew boiler, verify group temperature with a calibrated probe, and reset the PID setpoint against the measurement. Stability comes back with the heat path.
Group gaskets on the Doppia wear like they do on any commercial machine: gradually, then suddenly. A Rocket-spec gasket, fresh lubrication, and a seal verified across test shots puts it right. Worth bundling with a screen clean while the group is apart.
Brew boiler drift is the NTC sensor aging or scale insulating the element from the water it's supposed to read. The sensor gets tested, the boiler descaled, and the PID recalibrated against a reference probe. A sensor out of spec gets replaced rather than compensated for.
The steam boiler's pressure transducer reads through a sensing port that scale loves to colonise. We clean the port, recalibrate the transducer, and replace it if the readings keep wandering. Dry steam at the wand depends on the boiler holding honest pressure.
A frozen TFT, error screens, or a USB update that won't take usually mean corrupted controller firmware or a loose display ribbon. We reflash the firmware from a verified Rocket image on USB, reseat the ribbon, and quote the board only if the symptoms survive both. Most Doppia display complaints end at the reflash.
Mineral buildup on the flow meter impeller scatters the pulse count, and dose accuracy goes with it. Cleaning the impeller and reprogramming each dose against a target weight restores it. We verify by weight, not by eyeballing the cup.
If condensation pools at the tip despite the dry-steam pathway, the heated-pathway element has failed. We test it for continuity and replace it. The wand goes back to delivering steam, not water, from the first second.
Your coffee emergency ends here
Call or submit the form. We confirm your address, model, and the issue.
An experienced technician arrives, runs full diagnostics, and identifies the root cause.
You receive a flat, itemized quote. Nothing proceeds without your green light.
We complete the repair, run a test cycle, and walk you through what to watch for.
Parts on the truck
The record
Industrial site in Vaughan, machine threw a critical fault at 6 AM. Tech was on-site by 9, working again by 10. The kind of response we needed.
*Estimated based on the approximate distance from our nearest service centre, average commute time, and median service-call length for one machine. Prices in Canadian dollars (CAD $). Final quote provided on-site after diagnosis.
FAQ
21 answers covering service, repair, parts, installation, warranty, and edge cases.
Updated August 2026
Probably not. Most frozen TFTs are firmware hangs that clear with a reflash from a verified Rocket image over USB, and a loose display ribbon explains most of the rest. The controller board itself is the last suspect, and we test before quoting it.
The machine supports USB updates, but a failed or interrupted update is one of the more common ways these controllers end up corrupted. If you do it yourself, use a verified image and stable power. When an update has already gone wrong, we recover it with a clean reflash.
The brew groups are pre-heated from the brew boiler, and scale along that heat path starves them. A brew boiler descale plus a PID check against a calibrated probe restores it. If the NTC sensor has drifted out of spec, it gets replaced rather than compensated for.
Rocket heats the steam pathway so the wand delivers steam with minimal condensation, which means drier foam and less water in the milk. The failure mode is the heated-pathway element giving up, and the symptom is water pooling at the tip again. It's a continuity test and a part swap.
The steam boiler's transducer reads through a small sensing port that scale gradually blocks. Cleaning the port and recalibrating the transducer fixes most cases; a transducer that keeps drifting gets replaced. Steady steam pressure is what the dual-boiler design is for, so we don't leave this one approximate.
Flow meter impellers coated in mineral deposit, almost every time. We clean the impellers and reprogram each dose against a target weight, verified on a scale rather than by eye. A damaged meter is replaced before recalibration so the drift doesn't return.
For a lot of operators, yes. You gain a true dual-boiler, volumetric dosing, and the TFT controller without the cost or complexity of per-group boilers. From a service standpoint it stays sensible: more electronics than a Boxer, far fewer systems than an R 9.
Most single-fault visits finish inside the appointment: gaskets, sensors, transducer work, and reflashes are same-visit jobs. A full double-boiler descale takes longer, and we'll tell you the realistic window when you book. Parts we don't carry are usually in within a couple of business days.
Not more, but differently: with two boilers running simultaneously, scale gets two places to do damage, and the pre-heated group path is sensitive to it. On the harder water in parts of the GTA we recommend a softener and a shorter descale interval. The TFT makes drift easier to spot early, which helps.
Flat rate for the visit, parts billed at their actual cost on top. You'll hear the rate when you book, and for bigger jobs we quote in writing on-site before any work starts. No estimate that balloons mid-job.
Same-day. Call in the morning and a technician is usually on-site before the day is out; calls placed later in the day book for the next morning. Urgent breakdowns get priority routing.
The GTA and most of the Golden Horseshoe: Toronto through Mississauga, Vaughan, and Markham, out to Oshawa, Hamilton, and Niagara. If you're not sure you're in range, call and we'll tell you straight.
No. We work call by call. Plenty of customers put us on a maintenance schedule eventually, but that's their choice after seeing the work, never a requirement.
Parts carry their manufacturer warranty, and we stand behind our labour: if the same fault recurs, call us and we'll review it. Specific terms are discussed upfront on each job, not promised in marketing copy.
On-site whenever possible, which is most of the time. If a job genuinely needs the bench, like a full boiler rebuild or major electronics work, we'll say so before anything leaves your building.
Call us or send the form on this page. We confirm the machine, the fault, and a time window the same day. If it's urgent, say so and we'll route the nearest technician.
Diagnosis first: we confirm the fault, tell you what caused it, and quote the fix before touching a wrench. Most repairs finish in that same visit because the common wear parts ride on the truck.
High-wear parts for the platforms we service constantly ride on the truck. Anything else we order, usually next-day where suppliers allow, and we tell you the lead time before committing you to anything.
Usually, yes. We service legacy machines for as long as parts can be sourced, and we're honest when a repair stops making financial sense against a replacement. You get the math, you make the call.
Often, but that's not the pitch. We quote against the actual work, not a factory pricing book, and we'll tell you when a manufacturer warranty claim is the better route. Transparency is the value; the price usually follows.
Yes, and we do it by default on the way out. Half of repeat faults trace back to skipped daily cleaning or wrong routine, so the technician walks your team through what actually matters before leaving.
Tell us what the TFT shows; we'll bring the rest.
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