Blakeslee Conveyor Dishwasher Error Code W1: Thermal Protection
W1 THERMAL PROTECTION is a thermal protection alarm, and the manual does not name which device tripped. It says to contact Technical Service. A service technician has to identify the device.
High: a thermal protector has opened, so a device stopped to protect itself.
- Code
- W1
- Maker
- Blakeslee
- Equipment
- Conveyor dish machines
- Applies to
- RC-series rack conveyor with scrolling-text display and LED bar
What does Blakeslee error code W1 mean?
Several parts of a conveyor dishwasher have their own overload or temperature protectors. W1 THERMAL PROTECTION is the general alarm for a thermal protection that has tripped, and the manual does not say which device. Its only instruction is to contact Technical Service. In practice the technician traces the circuits behind the alarm: the pump motors, the conveyor drive, the heaters and any other protected device. A tripped protector means something ran too hot or drew too much current, such as a blocked strainer, a jammed drive or a worn motor. The specific pump alarms E7 and M7 and the optional motors alarm U10 are separate, so W1 is the alarm to expect when no more specific entry applies. It protects equipment from damage, which is why the machine stops rather than carrying on.
Affected models and control systems
Blakeslee RC-series rack conveyor dishwasher. The PDF is Blakeslee's RC44 User Manual and prints no model name; the same alarm list appears in the RC62 manual.
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
- W1 THERMAL PROTECTION on the display
- Part of the machine stops running
- Motor or heater area warm or humming
- Alarm returns after restart
Possible causes
Likely causes — what usually sits behind error code W1 on this control. A technician confirms which one it is before any part is replaced.
- A motor overheated and its thermal protector opened
- Mechanical jam or binding in a drive
- Blocked strainer overloading a pump
- Low or unbalanced supply voltage
Safe checks before calling for service
- Turn the machine off and let it cool.
- Look for anything obviously jamming the conveyor, visible without tools.
- Do not repeatedly restart the machine.
- Make sure the power supply to the machine is steady.
- Note what stopped and the exact display.
How a technician diagnoses error code W1
- Read the alarm history and look for pump or optional motor alarms before W1.
- Locate the tripped protector by checking each protected circuit with power locked out.
- Test voltage on every phase to the affected motor.
- Inspect the motor and drive for jams, wear and overheating.
- Remove the cause, reset the protector, and replace the failed part.
- The protected circuits run at line voltage.
- Finding which device tripped means working in the electrical section.
- The cause may be mechanical and require disassembly of a pump or drive.
How error code W1 differs from similar codes
W1 does not name a device. E7, M7 and U10 name specific pumps or optional motors.
Technical reference
- Maker documentation
- Blakeslee owner support
- Edition
- COD. 4950E_U_USA, Ed. 00 - 09/2016
- Models / control
- RC-series rack conveyor with scrolling-text display and LED bar
- 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
Why doesn't W1 say which device tripped?
The manual lists only a thermal protection alarm. The technician identifies the device.
Can I reset it myself?
Only turn the machine off and on once. If W1 returns, stop.
Is W1 the same as E7?
No. E7 is the wash 1 pump specifically.
Need help with Blakeslee error code W1?
A technician confirms the cause on site and gives you the price in writing before any work starts.