Blakeslee Conveyor Dishwasher Error Code E1: Wash Tanks Filling Failure
E1 WASH TANKS FILLING FAILURE means the wash tanks did not fill. The manual says to check the water inlet connection, turn the machine off and on after a few seconds, and call a service technician if the alarm persists.
High: with the wash tanks empty, the machine cannot wash.
- Code
- E1
- Maker
- Blakeslee
- Equipment
- Conveyor dish machines
- Applies to
- RC-series rack conveyor with scrolling-text display and LED bar
What does Blakeslee error code E1 mean?
A conveyor dishwasher has more than one wash tank, and the control fills them at start-up and watches for the levels to be reached. If the water does not reach the level in the time allowed, the control stops and displays E1 WASH TANKS FILLING FAILURE. The manual's meaning is that the wash tanks did not fill. It gives two steps for the operator: check that the water inlet connection is working, and turn the machine off with the ON/OFF button and on again after a few seconds. If E1 persists, the manual says to contact Technical Service. The most common reason is plain: a closed supply valve or an interrupted supply from the building. The prewash tank has its own alarm, M1, so E1 refers to the wash tanks.
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
- E1 WASH TANKS FILLING FAILURE on the display
- Tanks stay empty or low
- No sound of water filling
- Machine will not begin washing
Possible causes
Likely causes — what usually sits behind error code E1 on this control. A technician confirms which one it is before any part is replaced.
- Water supply valve closed or building supply off
- Inlet strainer blocked
- Fill valve that does not open
- Level sensing not seeing the water
Safe checks before calling for service
- Check that the supply valve is fully open and the inlet connection is in place.
- Turn the machine off, wait a few seconds, and turn it on again, as the manual says.
- Watch for water entering the tanks.
- If E1 returns, stop and do not keep restarting.
- Note whether water was entering and for how long.
How a technician diagnoses error code E1
- Read the alarm history and confirm E1 is active.
- Verify supply pressure at the machine's inlet and clean the strainer.
- Check the drain closes properly so the tanks hold water.
- Test the fill valve coil and voltage during a fill call.
- Inspect the level sensing and replace the failed part.
- Fill valves and level circuits run at line voltage inside the machine.
- Tanks that leak or overfill can wet live wiring.
- The valve, sensor and board input must be separated with a meter.
How error code E1 differs from similar codes
E1 is the wash tanks filling. M1 is the prewash tank, and Z17 is the rinse water supply.
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
Does E1 mean the machine is broken?
Often it is only the supply being off. The manual lists the inlet connection as the first check.
Should I restart it more than once?
Once, as the manual says. Repeated restarts hide the pattern a technician needs.
Is E1 the same as M1?
No. M1 is the prewash tank. E1 is the wash tanks.
Need help with Blakeslee error code E1?
A technician confirms the cause on site and gives you the price in writing before any work starts.