When a coffee roaster breaks down mid-batch, it’s not just an inconvenience — it’s a disaster for flavor, consistency, and the morning rush. Every minute counts when beans are half-roasted and orders are stacking up.
That’s exactly what happened at a local café and roastery in Charlotte, NC. Their Diedrich commercial coffee roaster suddenly lost heat balance and started making a loud, uneven scraping noise inside the drum. The roast profile was off, beans were scorching on one side and undercooked on the other — a clear sign of mechanical misalignment.
Luckily, they called Fix Commercial Appliance — the go-to team for specialty coffee equipment service across North Carolina.
Bearing Replacement and Temperature Recalibration for Even Roast
🔍 What We Found: Drum Misalignment & Bearing Wear
After a full inspection, our technician identified two key issues:
The drum shaft bearings were partially seized, causing resistance and noise during rotation.
The drum alignment had shifted out of calibration, throwing off heat distribution and airflow.
Carbon buildup around the exhaust port was restricting venting, increasing internal temperature fluctuations.
Left unattended, this could have led to a full motor failure or cracked drum bearings — both costly and time-consuming to replace.
🧰 The Fix: Precision Recalibration and Bearing Replacement
Here’s how we got this coffee roaster back to brewing perfection:
Disassembled and cleaned the drum assembly, removing built-up coffee oil residue and carbon deposits.
Replaced both front and rear bearings with OEM Diedrich components rated for high-heat applications.
Realigned the drum using precision laser alignment tools to ensure perfect rotation and balance.
Tested and recalibrated the thermocouple sensors for accurate temperature readings.
Verified airflow and exhaust performance, adjusting the fan motor RPM for optimal roasting curves.
Every detail was tuned to match the manufacturer’s specifications — no shortcuts, just craftsmanship.
✅ The Result: Smooth Rotation, Even Roast, Happy Baristas
Within a few hours, the coffee roaster was back online — running quieter, smoother, and hotter with pinpoint temperature control. The first test roast came out evenly caramelized, with consistent color and aroma across the batch.
The café owner summed it up best:
> “We thought we’d lose a whole day of roasting. You got us back up before lunch — the roast consistency is even better than before!”
That’s what we aim for at Fix Commercial Appliance — not just repair, but performance restoration that lasts.
💡 Why Coffee Shops Across Charlotte Trust Fix Commercial Appliance
Rapid-response repair for commercial coffee roasters, grinders, and espresso machines.
OEM-grade parts and factory-accurate calibration for precision coffee equipment.
Technicians trained to handle Diedrich, Probat, Toper, and Mill City models.
Service available 7 days a week across Charlotte, Huntersville, Mooresville, and Concord.
Whether your roaster needs a drum adjustment, burner calibration, or full rebuild — we bring the same level of detail and dedication to every job.
☕ Your Roast Deserves Perfection.
If your coffee roaster is making noise, losing temperature, or roasting unevenly, don’t wait.
Call Fix Commercial Appliance — Charlotte’s trusted expert in commercial coffee roaster repair.
📞 +1 (704) 701-3070
☕ Commercial Coffee Roaster Repair Charlotte NC — Diedrich Drum Alignment
