Brew tap leaking at the bar surface
The seal in the tap collar wears and weeps onto the bar. We pull the tap, fit a new seal kit, and verify clean operation at the surface.

Under-counter espresso, on bar
A Modbar AV tap is weeping onto your bar, or the under-counter module has gone quiet during service? We repair these split setups regularly: tap seals and screens, the under-counter group, pumps, gicleurs, and the bar-to-module cabling. Tell us which tap and what it is doing when you call, and the seal kits and parts ride out to fix it on the first visit.
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A Grajqevci technician will get back to you today to confirm your machine and book the visit. If it's urgent, call us directly at (289) 217-3796.
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La Marzocco · Under-counter modular espresso (volumetric)
The Modbar AV moves the espresso machine under the counter and leaves only the brew tap on the bar. The boilers, pumps, and electronics live in a cabinet below, which gives cafes clean sightlines and a custom bar, with volumetric dosing and the saturated-group core feeding each tap, rated to about 300 shots a day per tap. On the bench the split layout is the difference: most diagnosis happens below, and the bar-to-module cable and cabinet ventilation join the usual group and boiler work.
Why Grajqevci
Call in the morning and a technician is usually on-site before the day is out. Most La Marzocco Modbar AV jobs get diagnosed and fixed on the first visit.
Commercial coffee equipment is all we do, and La Marzocco Modbar AV 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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Modbar AV faults we diagnose
Below are the Modbar AV faults we meet on real service calls, with the cause of each and what we do at the machine.
The seal in the tap collar wears and weeps onto the bar. We pull the tap, fit a new seal kit, and verify clean operation at the surface.
Oils and fines clog the screen at the tap. We pull it, clean it in cafiza, and replace it if worn.
Rotary pump wear in the under-counter module. We gauge pressure at the tap, reset the OPV, and replace the pump if it reads below spec.
Scale or fines restrict the gicleur. We pull it from the under-counter module, clean it ultrasonically, and verify flow at the tap.
Scale on the brew element drifts the temperature. We open the under-counter module, descale, test element resistance, and recalibrate the PID offset.
Modbar AV pairs with the Steam module. We descale the steam circuit and replace the element if it is drawing low.
We pressure-test, dye-trace under-counter, and replace fittings rather than retighten.
A scaled level probe or a leaking solenoid in the module. We clean the probe and replace the solenoid.
A failing pre-infusion solenoid in the module. We replace it and verify the pre-infusion curve at the tap.
Flow meters in the under-counter module mineralize and pulse unevenly. We clean each meter and reprogram doses by weight.
Either the cable between bar and module is intermittent or the bar-side controller has failed. We trace the cable, replace it if damaged, and test the controller.
We open the module, read the fault log, and address the root cause, whether that is a sensor, a solenoid, or the board.
Cosmetic. We replace the tap exterior with original-spec parts.
Modbar modules need clearance to breathe. We confirm the install meets La Marzocco spec, add ducting if the cabinet is starving for air, and reset the thermal cutouts.
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
What we've done
Tech corridor office in Markham. Our machine throws an error code, I send a photo, they tell me what it is on the phone, often without dispatching. That kind of help is rare.

*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
20 answers covering service, repair, parts, installation, warranty, and edge cases.
Updated August 2026
The seal in the tap collar wears and lets water weep at the surface. We pull the tap, fit a new seal kit, and verify clean operation at the bar. It is a contained job that does not need the whole under-counter module pulled apart.
Either the cable running between the bar tap and the under-counter module is intermittent, or the bar-side controller has failed. We trace the cable, replace it if it is damaged, and test the controller. The cabling is the usual culprit on a split system.
That is the normal way these are built. We access the under-counter module to reach the boiler, pump, gicleur, solenoids, and controller, and only the tap work happens up top. As long as the cabinet is accessible, a Modbar service is no slower than a countertop machine.
Almost certainly. Modbar modules need clearance to breathe, and a tight or sealed cabinet starves them of air so they overheat and trip thermal cutouts. We confirm the install meets La Marzocco's ventilation spec, add ducting if the cabinet is too tight, and reset the cutouts.
Yes. It is usually a clogged gicleur in that tap's under-counter group. We pull it, clean it ultrasonically, and verify flow at the tap. If pressure is low across the board, we check the rotary pump instead.
Yes. The flow meters in the under-counter module mineralize and pulse unevenly. We clean each meter and reprogram the doses by weight, the same as on a countertop machine, just accessed from below.
Much of the core is shared: saturated group, dual boiler, gicleurs, solenoids, and flow meters. The Modbar-specific parts are the tap assembly, its seal kits, and the bar-to-module cabling, all of which we carry or source for these installs.
Yes. The Steam module is the dedicated under-counter steam boiler that feeds a tap on the bar, and we service it alongside the AV: descaling, element and pressure stat work, and the steam valve in the tap. One visit covers the whole bar.
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.
One call reaches a tech who knows the under-counter Modbar layout.
Call (289) 217-3796 now →