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Error code · Convotherm · Combi ovens

Convotherm Combi Oven Error Code E59.0: Rinse Aid Pump

E59.0 on a Convotherm C4 reads Rinse aid dispensing pump fault. Fill the canister with rinse aid and restart the unit, repeating if necessary until the lines are filled. If it will not clear, contact Customer Service.

Medium · inspection needed

Low: only the rinse step of automatic cleaning is affected.

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Code
E59.0
Maker
Convotherm
Equipment
Combi ovens
Applies to
Convotherm 4 (C4 easyTouch / easyDial, incl. Maxx pro)

What does Convotherm error code E59.0 mean?

After the cleaning agent has done its job, the oven rinses the cabinet, and a second dispensing pump adds rinse aid from its own canister so the chamber dries without streaks or cleaner residue. The control checks that this pump moves liquid when the rinse stage calls for it. If the canister is empty, air has entered the line, or the pump does not deliver, the check fails and the oven displays E59.0 Rinse aid dispensing pump fault. Cooking functions are not tied to this pump, so the oven goes on baking and steaming, but the full cleaning program cannot finish properly. Rinse aid is thin and the line is short, so a canister that has just run out is the typical reason. The manual's step is practical: fill the canister with rinse aid, restart, and repeat if necessary until the line is full of liquid again.

Affected models and control systems

Convotherm 4 (C4) floor-standing combi ovens, from the UL / USA operating manual. Table-top and maxx pro models are not named in the text we read.

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

  • E59.0 shown during or after a cleaning cycle
  • Rinse stage skipped or incomplete
  • Streaks or film left in the chamber
  • Rinse aid canister empty

Possible causes

Likely causes — what usually sits behind error code E59.0 on this control. A technician confirms which one it is before any part is replaced.

  • Rinse aid canister ran empty
  • Air trapped in the rinse aid line after refilling
  • Canister cap or suction tube not seated
  • Pump or check valve gummed up by dried rinse aid

Safe checks before calling for service

✓ What an operator can do
  1. Look at the rinse aid canister and refill it with rinse aid, not cleaner.
  2. Check that the suction tube reaches into the liquid and the cap is closed.
  3. Restart the unit.
  4. Repeat the restart if necessary until the line fills, as the manual instructs.
  5. If E59.0 stays, contact Customer Service and note which products you use.

How a technician diagnoses error code E59.0

  1. Read E59.0 and the history and see whether it appears at the rinse stage only.
  2. Inspect the canister, tube and fittings for air leaks.
  3. Run the priming sequence and watch for liquid reaching the cabinet.
  4. Measure the supply to the pump when rinse is requested.
  5. Check the pump and check valve for deposits or damage.
  6. Replace the pump only if the voltage is present and the pump does not move liquid.
! Leave this to a technician
  • Opening the rinse aid and cleaning lines means handling chemicals that irritate skin and eyes.
  • Voltage checks at the pump are made with the oven powered and the cover off.
  • Telling a blocked check valve from a weak pump takes disassembly and a priming test.

How error code E59.0 differs from similar codes

E58.0 is the matching code for the cleaning agent pump.

Technical reference

Maker documentation
Convotherm owner support
Edition
9761695_06 engUSA 05/22
Models / control
Convotherm 4 (C4 easyTouch / easyDial, incl. Maxx pro)
Section
6.2.1 Error codes (Errors and required responses), pp. 105
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.

→Same maker

Related Convotherm combi oven error codes

Error code shown with an acoustic signal; confirm it and start an available cooking or cleaning profile (emergency mode)Convotherm Combi Oven Emergency Mode: Limited Cooking After an ErrorE01.0 / E01.1Convotherm Combi Oven Error Code E01.0 / E01.1: Low WaterE01.xConvotherm Combi Oven Error Code E01.x: Not Enough WaterE02Convotherm Combi Oven Error Code E02: Electrical Compartment Too HotE02.0Convotherm Combi Oven Error Code E02.0: Wiring Compartment Too HotE03.0Convotherm Combi Oven Error Code E03.0: Fan Motor ProtectionE04.0Convotherm Combi Oven Error Code E04.0: Secondary FanE05Convotherm Combi Oven Error Code E05: No Gas SupplyE05.xConvotherm Combi Oven Error Code E05.x: No GasE10Convotherm Combi Oven Error Code E10: Water Filter CartridgeE11.0Convotherm Combi Oven Error Code E11.0: Oven Sensor Reads Too HighE12.1 / E12.2 / E12.3 / E12.4Convotherm Combi Oven Error Code E12.1-E12.4: Core Probe Reads High
E59.0Questions about Convotherm error code E59.0
Is E59.0 the rinse aid or the cleaner?

E59.0 is the rinse aid pump. The cleaning agent pump is E58.0.

Will the oven still cook with E59.0?

Yes. Cooking is not affected; only the rinse part of automatic cleaning is.

How many restarts are normal?

The manual says to repeat if necessary until the lines are filled. If several tries do nothing, call for service.

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