Two stations, one peak rush
When one side of your G4 ThermoPro Twin drops out, your throughput halves right as the orders stack up. We repair both stations at the counter: a sprayhead scaling faster on one side, a brew valve leaking by, a server that's lost its vacuum, a station mapped to the wrong recipe. Two of everything means we check the healthy side too, so you don't book us twice.
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Wilbur Curtis · Premium twin-station batch brewer
The G4 ThermoPro Twin runs two separate brew stations off one chassis, rated for up to 200 gallons a day. Each side has its own tank, element, sprayhead, brew valve, and ThermoPro server, so a busy kitchen can brew regular and decaf at once or simply keep two pots ahead of the rush. On the bench the catch is asymmetry: the supply-pressure split scales one side ahead of the other, so the stations rarely wear in step, and we service them as a pair.
Why Grajqevci
Call in the morning and a technician is usually on-site before the day is out. Most Wilbur Curtis G4 ThermoPro Twin jobs get diagnosed and fixed on the first visit.
Commercial coffee equipment is all we do, and Wilbur Curtis G4 ThermoPro Twin 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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G4 ThermoPro Twin faults we diagnose
These are the two-station G4 ThermoPro Twin faults that book real service calls, with the cause behind each and how we resolve it.
The supply pressure split between the two heads scales one side faster than the other, especially on hard GTA water. We pull both sprayheads, descale, and verify spray pattern matches across both basket areas. Asymmetric scale is normal and we plan service accordingly.
Scale across both supply paths or grind drift on the operator's beans. We descale both heads, verify the spray pattern reaches full basket edge on both stations, and check grind against Curtis's spec for the batch size.
Diaphragm seat wear on the affected solenoid. We test both coils, inspect both seats, and replace the failed valve. We typically check both for preventive wear since they age on the same duty cycle.
Bypass orifice scaling differently between sides. We measure bypass flow on each station, recalibrate timing per station, and replace the bypass cartridge on the affected side if leak-by is out of spec.
Element scale or element degradation on the affected side. We descale the tank, amp-test the element on each station independently, and replace whichever element is below spec. The two stations heat independently so we can isolate each.
Vacuum degradation on the affected server. We pressure-test both server vacuums, replace the lid seal and dispense valve gasket on the failed unit, and quote replacement where the vacuum chamber is compromised.
Per-station counter that needs resetting through service menu. We verify the cycle ran end-to-end on the affected side and reset the counter. Water hardness configuration is checked across both stations.
Shared inlet manifold fitting or a tee gasket. We isolate water, pressure-test the manifold, replace the failed fitting, and verify dry operation across multiple brew cycles.
Grind drift on the bin assigned to that station or a partially-blocked sprayhead delivering surge flow. We check the grind against spec for the affected station's batch size and clear the sprayhead.
Controlled reboot, fault log read, firmware reflash if needed. Programmed recipes for both stations are backed up before any reflash. Hardware faults are quoted before parts are ordered.
Sensor-to-station mapping error after a controller swap or firmware update. We verify wiring against the schematic, correct the station mapping in service menu, and confirm temperature and brew states display on the correct side.
Seal kit wear at the 1-2 year mark. We replace seal kits on both servers as preventive while we have the parts on the truck. Lid gaskets are renewed at the same visit.
Recipe assignment fault or controller memory corruption. We back up settings, reflash firmware, restore recipes, and verify each station brews to its programmed profile.
Backup capacitor or battery failure on the controller. We reprogram both stations, replace the backup power source, verify settings hold through a controlled power cycle.
NTC probe drift on the affected side. We measure probe resistance, replace it if out of spec, and verify the controller reads target temperature once the new probe is installed.
USB or Ethernet hardware fault, or service-mode lockout. We verify port hardware, reset service-mode access, and reflash firmware if the driver has corrupted.
Firmware bug on certain G4 Twin revisions. We check current firmware version, apply the documented patch that addresses the synchronization fault, and verify both stations cycle independently after the update.
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
By the numbers
Long-term care home with three machines across our two floors. Their team treats the residents with respect every time they visit. That matters to us.
*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 supply-pressure split feeds the two heads unevenly, so one sprayhead scales ahead of the other and its spray stops covering the basket. We pull both heads, descale, and match the spray pattern across both stations. Because they share a duty cycle, we check the stronger side at the same visit.
No. The Twin's stations run independently, so a fault on one side rarely touches the other. We isolate the failed station, read its fault, and replace the affected sensor, valve, or board section without disturbing the working side.
Element scale or a degrading element on that station. Each side heats independently, so we descale and amp-test the affected element alone, then replace it only if it's below spec. The good side keeps brewing while we work.
Yes. That's usually a station-to-recipe mapping error from the controller change. We back up settings, correct the mapping in the service menu, and confirm each station brews to its own programmed profile and shows the right status on the correct side.
Vacuum degradation on the weak server. We pressure-test both, replace the lid seal and dispense gasket on the failing one, and quote a replacement only if its vacuum chamber is actually compromised. We'd rather not sell you a server you don't need.
The two stations share an inlet manifold, so the usual suspect is a manifold fitting or a tee gasket. We isolate the water, pressure-test the manifold, replace the failed fitting, and run multiple cycles to confirm it's dry.
Yes. Twin jobs ride with duplicate wear parts, sprayheads, valve assemblies, seal kits, and a spare element, so a two-station repair almost never needs a second visit. Anything unusual we order with the lead time told upfront.
Usually, yes. At up to 200 gallons a day it's built for exactly this load, and what fails, the seals, sprayheads, valves, and elements, is inexpensive against replacing a twin-station brewer. We give you the repair cost and an honest read on the chassis before you decide.
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 visit covers both stations, healthy side included.
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