Blakeslee Conveyor Dishwasher Error Code C10: Pre-Rinse Temperature Alarm
C10 PRE-RINSE TEMPERATURE ALARM is the pre-rinse temperature alarm. The manual says to make sure the rinse arms and nozzles are in the right position, and to call a service technician if it persists.
Medium: the pre-rinse temperature is off, but the machine may still run.
- Code
- C10
- Maker
- Blakeslee
- Equipment
- Conveyor dish machines
- Applies to
- Blakeslee rack conveyor with pre-rinse section (PDF is Blakeslee's 'RC64 User Manual'; the RC86 user manual is the same document); prints no model name
What does Blakeslee error code C10 mean?
The control measures the pre-rinse water temperature while racks pass through, and if it falls outside what is expected, it raises C10 PRE-RINSE TEMPERATURE ALARM. The manual calls it the pre-rinse temperature alarm without saying whether high or low. Its operator check is the position of the rinse arms and nozzles: if they are knocked out of place, spray lands wrongly and the temperature reading can move. If they are correct and the alarm stays, the manual says to contact Technical Service. Heavy racks, a fast conveyor or cold incoming water can drag the temperature down, while a heater problem can push it off in either direction. C10 differs from C2, a probe failure, and from C3, where the section is not heating at all.
Affected models and control systems
Blakeslee rack conveyor dishwasher with a pre-rinse section. The PDF is Blakeslee's RC64 User Manual, and the RC86 manual is the same document; it prints no model name.
Code numbers and their meaning can change between control generations. We match the full model and control before acting on a code.
What you may notice
- C10 PRE-RINSE TEMPERATURE ALARM on the display
- Pre-rinse water lukewarm or too hot
- Soil not loosened before the wash
- Alarm during heavy loading
Possible causes
Likely causes — what usually sits behind error code C10 on this control. A technician confirms which one it is before any part is replaced.
- Pre-rinse arms or nozzles out of position
- Heater output reduced by an ageing element
- Cold supply or high flow cooling the tank
- Pre-rinse probe reading incorrectly
Safe checks before calling for service
- Check that the rinse arms and nozzles in the first station are seated in the right position, as the manual says.
- Slow the racks for a few minutes and see whether the alarm clears.
- Run a rack of clean dishes to test.
- If it persists, stop washing and do not adjust anything inside.
- Note when it shows, for example after a rush of racks.
How a technician diagnoses error code C10
- Read the alarm history and compare it with C2 and C3 entries.
- Measure the pre-rinse temperature with a reference thermometer.
- Check flow and pressure at the inlet.
- Test the heating circuit under load.
- Clean the nozzles and replace the failed part.
- The pre-rinse tank holds hot water and pressurized spray.
- Heating circuit tests are on live line-voltage wiring.
- Telling a heater problem from a flow problem needs metering and a thermometer.
How error code C10 differs from similar codes
C10 is a temperature alarm for the pre-rinse. C2 is a probe failure and C3 is a heating failure.
Technical reference
- Document
- Instructions for Use and Maintenance (USA) rack conveyor with pre-rinse section; published on blakesleeinc.com as 'RC64 User Manual'
- Maker documentation
- Blakeslee owner support
- Edition
- COD. 4900E_U_USA, Ed. 01 - 02/2018
- Models / control
- Blakeslee rack conveyor with pre-rinse section (PDF is Blakeslee's 'RC64 User Manual'; the RC86 user manual is the same document); prints no model name
- Section
- Chapter 12.2.1 Alarms description (pp. 54-55)
- Checked
- October 2026
We use the maker's document to read the code and do not reproduce it. Always confirm the complete model and control before applying these steps.
Related Blakeslee conveyor dish machine error codes
Is C10 high or low?
The manual calls it a temperature alarm without saying which.
Why check the rinse arms?
If they are out of place, spray and temperature behave differently.
Is the probe failing?
No. A probe failure shows as C2.
Need help with Blakeslee error code C10?
A technician confirms the cause on site and gives you the price in writing before any work starts.