DTF Printer White Ink Agitator Motor Not Working and WIC Reset Printhead Overheating Error: Troubleshooting WIMS, Motor, and Control Board Issues

Question

My DTF printer's white ink agitation system stopped working. I could hear the control board clicking as though it was trying to activate the agitator motor, and a voltmeter showed voltage at the motor connection.

I replaced the agitator motor, but after installation, the new motor only produced a brief humming sound and then stopped. Because of that, I suspected the agitator control board might be defective, so I replaced the board as well. The replacement board still clicked when activated, but the white ink agitator motor would not run.

Thinking I may have damaged the replacement motor during installation, I installed another new motor. After turning the printer on, the white and blue lights began flashing, and the carriage stopped slightly to the left of its normal home position. WIC Reset reported that the printhead had become too hot. This is the second time I have received a printhead overheating error, even though the printhead is brand new and has never actually been used for printing.

I was eventually able to clear the flashing-light condition, and the printer appears to be printing again. However, the WIMS white ink agitator motor is still not operating.

What could cause the white ink agitator motor to remain inactive even after replacing both the motor and its control board? Could the agitator wiring or electrical problem also be related to the WIC Reset "printhead got too hot" error?

Answer

The Clicking Sound Does Not Necessarily Mean the Agitator Board Is Working

One of the most important clues is that you can hear the white ink agitation control board clicking.

A click usually indicates that a relay or another switching component is being activated. However, it does not necessarily mean that usable power is reaching the motor.

A relay can click while still having:

• Burned or damaged internal contacts

• Insufficient current available at the output

• A bad ground connection

• A damaged connector

• A broken wire

• Excessive resistance in the wiring

• A failed transistor or MOSFET controlling the relay

• An incorrect power supply voltage

• A voltage that appears normal when unloaded but collapses when the motor is connected

This last condition is particularly important.

You mentioned measuring voltage with a voltmeter. That is useful, but measuring voltage without the motor operating does not necessarily tell us whether the circuit can supply sufficient current under load.

For example, you may see the expected voltage at the connector when the motor is disconnected. Once the motor is connected and attempts to start, a weak power source, damaged wire, bad connector, or defective switching component can cause the voltage to collapse almost immediately.

That could explain why one replacement motor briefly hummed and then stopped.

Measure the Voltage While the Motor Is Connected

If you are comfortable working with electrical measurements, one useful diagnostic distinction is the voltage:

1. With the agitator motor disconnected.

2. With the agitator motor connected but stationary.

3. At the moment the agitator controller attempts to activate the motor.

Suppose, for example, that the system is designed to supply a particular DC voltage and you measure approximately that voltage with the motor disconnected. If the voltage falls dramatically as soon as the motor is connected, the problem is probably not simply the motor.

You would then need to investigate the power supply, control board, wiring, connectors, and ground path.

The actual required voltage depends on the particular white ink management system installed on your printer, so do not assume that a replacement motor with a similar physical appearance has the same voltage requirement.

Confirm That the Replacement Motor Has the Correct Voltage Rating

This is another area I would check carefully.

DTF conversion kits and WIMS systems do not all use identical motors. Motors that look almost identical may be designed for different voltages.

For example, depending on the design, an agitator system could use a motor intended for 5 V, 12 V, 24 V, or another operating voltage.

If a motor designed for a lower voltage is connected to a higher-voltage circuit, it may:

• Hum briefly

• Run unusually fast

• Become hot

• Damage its winding

• Fail almost immediately

The opposite problem can also occur. A higher-voltage motor connected to a lower-voltage supply may receive enough energy to hum but not enough torque to begin rotating.

Therefore, compare the voltage and current specifications printed on the original motor with those of the replacements whenever possible.

Check Whether the Agitator Mechanism Is Mechanically Binding

A motor that hums but does not rotate can also indicate a mechanical load problem.

Before assuming another motor has failed, check whether the agitator assembly itself moves freely.

Depending on the WIMS design, inspect the:

• Agitation shaft

• Coupler

• Gearbox

• Magnetic stirrer assembly

• Pulley

• Belt

• Pump or circulation mechanism

• Motor bracket

Dried white ink can create substantial resistance. White pigment settles very aggressively, and dried titanium-dioxide-based ink can become extremely difficult for a small DC motor to move.

If possible, disconnect the motor mechanically from the agitation mechanism and determine whether the motor operates without the load attached.

If the motor runs normally when disconnected from the agitator but stops when connected, the problem is probably mechanical resistance rather than the control electronics.

Test the Motor Independently Only at Its Correct Rated Voltage

Another useful diagnostic method is to test the agitator motor independently from the printer.

However, this should only be done if you know the motor's rated voltage and polarity.

If the motor operates normally from an appropriate external DC power source, you have established that the motor itself is probably functional. The investigation can then move upstream toward the wiring and control circuit.

If the motor does not operate from a correct external power source, then the motor or its gearbox may be defective.

Avoid applying an unknown voltage directly to the motor simply to "see if it spins." That can destroy a good motor very quickly.

Inspect the Entire Wiring Harness, Not Just the Motor and Board

Because you have already replaced both the motor and the control board without solving the problem, I would become increasingly suspicious of something common to both components.

The wiring harness is one of those common components.

Look closely for:

• Pinched wires

• Partially broken conductors

• Loose crimp terminals

• Connectors pushed backward out of their housings

• Oxidized contacts

• White ink contamination inside connectors

• A loose ground wire

• Incorrect connector orientation

• Damaged extension cables

• Incorrect wiring from a previous modification

• Wire insulation cut by the printer frame

A wire can appear intact externally while the conductor inside is broken.

A continuity test from one end of each wire to the other can therefore be useful. If you perform continuity testing, the printer should be powered off and unplugged.

Also check for unintended continuity between adjacent wires or between a power wire and the printer chassis. That may reveal a short circuit.

Pay Particular Attention to the Power Source Shared by the WIMS

Many aftermarket DTF white ink systems obtain power from an added DC power supply or from a modified connection inside the printer.

If the WIMS controller is clicking but the motor is not operating, verify the actual power entering the WIMS control board-not only the output going toward the motor.

A failing power supply can produce normal-looking voltage without load and then collapse when the motor attempts to start.

It is also possible for a loose DC connector, damaged terminal block, or poor ground to create exactly this behavior.

Why Replacing the Control Board May Not Have Solved It

Since the replacement controller produces the same click as the original controller, there are several possibilities.

The original board may never have been the primary problem.

Another possibility is that something elsewhere in the system damaged both boards or prevented both boards from operating correctly.

For example:

Incorrect input voltage: If the controller is receiving the wrong voltage, replacing it with another controller will not solve the underlying problem.

Shorted motor wiring: If the cable going to the motor is shorted, a replacement board can immediately experience the same overload.

Motor mismatch: If the replacement motor requires significantly more current than the controller was designed to provide, the controller may shut down or eventually fail.

Poor ground: The relay may activate while the motor circuit itself does not have a complete return path.

Mechanical stall: A stalled motor can draw considerably more current than a freely spinning motor.

This is why I would avoid continuing to replace motors and boards until the voltage, wiring, current path, and mechanical load have been checked.

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About the White and Blue Flashing Lights and the WIC Reset "Printhead Got Too Hot" Error

The second issue deserves special attention because a printhead overheating error should not automatically be interpreted as evidence that the printhead physically became hot.

You reported that WIC Reset indicated that the printhead got too hot. You also mentioned that this happened with a brand-new printhead that had never actually been used for printing.

That makes me particularly interested in the printhead electrical circuit.

A printer determines printhead conditions electronically. If the printer receives an abnormal resistance, voltage, temperature-sensor reading, or other unexpected electrical signal, the firmware can interpret that condition as an overheated head even when the physical printhead has not actually been operating long enough to become hot.

A Printhead Cable Problem Can Produce an Apparent Overheating Error

Whenever a printhead has recently been replaced, I would carefully inspect the FFC/FPC ribbon cables connecting the printhead to the carriage electronics or mainboard.

Check for:

• A ribbon cable inserted at an angle

• A ribbon cable not fully inserted

• A cable inserted into the wrong connector

• Folded or damaged contacts

• Ink or cleaning fluid on the cable

• Burn marks

• Carbonized connector contacts

• A torn conductor

• Cable contacts touching adjacent pins

• Damage to the connector locking tab

A very small amount of conductive contamination can cause serious problems in a printhead circuit.

Never Connect or Disconnect the Printhead With Power Present

The printer should be completely powered down and disconnected from electrical power before printhead cables are connected or disconnected.

This is particularly important with Epson-based DTF printers.

Connecting a printhead or ribbon cable while electrical charge remains in the machine can potentially damage:

• The printhead

• The carriage board

• The mainboard

• Head-driving transistors

• Fuses

• Other printhead-control circuitry

Depending on the printer, it can be prudent to disconnect power and allow time for stored electrical energy to dissipate before working with these cables.

A Brand-New Printhead Does Not Rule Out an Electrical Problem

The fact that the head is new does not necessarily eliminate the head circuit as the source of the error.

There are at least three possibilities:

1. The new head itself is defective.

2. Something in the cable or printer electronics is producing an abnormal signal.

3. An external electrical modification is interfering with the printer's electronics.

The third possibility is particularly relevant here because you are simultaneously experiencing a problem with an aftermarket white ink management system.

I cannot say from the symptoms alone that the WIMS problem caused the printhead overheating warning. They may be completely independent problems.

However, if the WIMS and printer electronics share a power source, grounding point, or modified wiring connection, I would not ignore the possibility of a relationship.

Check for a Grounding or Short-Circuit Problem Before Replacing Another Printhead

Since you have encountered the printhead overheating error twice, I would be cautious about installing additional expensive printheads until the surrounding electronics have been examined.

A recurring electrical condition can potentially damage each replacement component.

Before replacing another head, I would want to have reasonable confidence in:

• The printhead ribbon cables

• The carriage-board connectors

• The printhead connectors

• The printer's power supply

• Relevant mainboard fuses

• The head-driving circuitry

• Any modifications associated with the DTF conversion

• WIMS wiring

• Ground connections

• Added power supplies

If there is a short circuit elsewhere, installing another new printhead may simply expose that head to the same problem.

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Why the Carriage Stopped Slightly to the Left of the Home Position

You also mentioned that the carriage stopped just to the left of its normal home position when the white and blue lights were flashing.

This can happen when the printer aborts its startup sequence because it detects an electrical or mechanical fault.

It does not necessarily mean that the carriage position itself caused the printhead-temperature error.

During startup, the printer has to complete several checks. Depending on the printer, these can involve:

• Carriage movement

• CR encoder detection

• Home-position detection

• Pump/capping-station movement

• Printhead communication

• Sensor checks

• Motor checks

If the electronics detect a critical error during this process, the carriage may simply stop wherever it was at that point.

Since you subsequently cleared the flashing-light condition and the printer appears to print again, I would concentrate on the persistent WIMS failure while remaining cautious about the previous printhead overheating warning.

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The WIMS Motor Problem May Now Be Easier to Isolate

The encouraging part of your update is that the printer is apparently printing again while the white ink agitation motor remains inactive.

That helps separate the two symptoms.

At this point, I would approach the WIMS system as an independent circuit and trace it systematically:

Power source → controller input → controller switching output → wiring harness → motor → mechanical agitator

Instead of replacing another component, determine where electrical power disappears.

For example, if correct voltage reaches the controller but never appears at the motor output when the relay clicks, investigate the controller or its switching circuit.

If correct voltage appears at the controller output but not at the motor connector, investigate the wiring.

If correct voltage remains at the motor connector while the motor is connected and commanded on, but the motor does not rotate, investigate the motor specifications, polarity, connection, or mechanical load.

If the motor works when separated from the mechanical agitator, investigate the agitator mechanism for excessive resistance.

This method is usually much more productive than continuing to replace parts individually.

Also Verify How the WIMS Is Supposed to Operate

One more thing worth checking is whether your particular WIMS runs continuously.

Some white ink management systems operate the agitator:

• Continuously

• At timed intervals

• Only while the printer is powered on

• Only after a delay

• In alternating agitation and rest cycles

Therefore, hearing the relay click may indicate that the controller is following a timing sequence.

If you know the exact WIMS controller model, compare its behavior with the manufacturer's intended operating cycle before concluding that every period of inactivity represents a failure.

The important question is whether the motor receives its required voltage during the period when the relay commands it to run.

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A Brief Word About the WIC Reset Error

The WIC Reset message reporting that the printhead got too hot is the error description you specifically encountered. Since no numerical error code was included in your question, I do not want to invent a code and potentially send you in the wrong direction.

If WIC Reset provides a numerical code together with the "head got too hot" description, write down that exact code the next time it occurs. The numeric code can help distinguish a true printhead-temperature-related condition from another electrical fault that produces a similar warning.

Likewise, the combination of flashing white and blue printer lights is useful diagnostic information, but the interpretation varies by Epson model and firmware. The exact printer model and any displayed numerical error code should always be considered together.

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Addressing printer problems can be complicated because so much of the diagnosis depends on physically inspecting, measuring, and testing the machine. For that reason, we're not able to provide remote troubleshooting, suggestions, or support for individual printer repairs. We do offer an in-person evaluation and repair service through our BCH Technologies printer diagnostic and repair facility [https://bchtechnologies.com/printer-repair-service].

Because demand for this service is high, repairs are handled on a first-come, first-served basis, and it may take a few weeks before an appointment or printer drop-off becomes available. Our service can be structured around either the complete printer or certain individual components, and the service page provides instructions for proceeding. We also understand that professional diagnostic and repair work is not always the most economical option, so we strongly encourage self-help and online research whenever you are comfortable doing so.

A good place to begin is YouTube, including the BCH Technologies YouTube channel [https://youtube.com/@bchtechnologies]. On our channel homepage, use the search icon located near the "About" section on the right side of the menu bar and enter specific terms related to your problem, such as "DTF white ink agitator," "WIMS motor," "Epson printhead cable," or the exact printer model and error. I receive dozens of questions every day asking whether I have a video covering a particular subject. After creating printer repair videos for more than nine years, it can be difficult to remember every video individually, so using YouTube's channel search is usually the fastest way to locate relevant material. YouTube may also recommend useful videos from other repair channels that address the same issue.

Thank you again for reaching out and for providing such a detailed description of what happened. The sequence of events you documented-particularly the relay clicking, the motor briefly humming, the repeated component replacements, and the temporary printhead-temperature warning-provides valuable information for understanding the problem. We sincerely appreciate your support of BCH Technologies and our YouTube channel, and we hope the information above gives you a clearer framework for diagnosing the white ink agitation system safely and methodically.