Rocket Espresso
Brew Temperature Instability
Brew temperature seems inconsistent; shots vary from sour to bitter without grind or dose changes.
Advertisements
Safety Warning
This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.
If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.
Advertisements
Possible Causes
Faulty PID sensor, Poor thermal contact on temperature probe, Scale in heat exchanger, Incorrect PID settings
How to Fix / Troubleshooting
Safety first: Unplug and cool the machine before accessing internal components.
- Stabilize warm-up: Allow at least 30–45 minutes for the machine to fully warm up before evaluating temperature stability.
- Flush routine: On HX models, use a consistent cooling flush before each shot to stabilize group temperature.
- Inspect PID probe: Check that the brew boiler or HX temperature probe is firmly seated and its wiring is intact.
- Verify PID settings: Ensure the target temperature and any advanced parameters are set according to Rocket's recommendations. Avoid drastic changes without guidance.
- Descale if needed: Heavy scale can affect heat transfer. A professional descale may be required for long-neglected machines.
Advertisements
Repair Difficulty
Medium
3/5
Required Part
Brew Boiler Temperature Probe
Check Price on Amazon
We may earn a commission from links on this page.
Advertisements