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Error code reference

Dacor Oven Error Code U60

Upper/single cooling fan failure

Dacor codesDacor oven codes

Upper/single cooling fan failure - low speed tachometer reading has exceeded 750 or is below 50 pulses per second.

First step from the service manual

Check fan speed and operations in service screens. If operational and speed between 1 and 50, clear blockages. Verify fan blades are attached and undamaged.

The complete diagnostic procedure includes additional test steps, resistance specifications, wiring diagram references, and component test points.

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What U60 means on a Dacor oven

The U60 error code on a Dacor oven indicates a failure condition in the upper or single cooling fan circuit, specifically related to an abnormal tachometer reading at low speed. The cooling fan uses a tachometer signal to report its rotational speed back to the control board. Under normal operation, this pulse signal should fall within an acceptable range. When the tachometer reading exceeds 750 pulses per second or drops below 50 pulses per second at low speed, the control board logs U60 and flags the fan as non-functional. This fan is responsible for circulating cooling air over electronic components and the control board housing, protecting them from heat damage during and after oven operation.

The two failure thresholds point to distinct types of problems. A reading above 750 pulses per second suggests the fan may be running at an uncontrolled or runaway speed, possibly due to a shorted motor winding or faulty control signal. A reading below 50 pulses per second indicates the fan is spinning too slowly or not at all, which can result from a blocked airflow path, a detached or damaged fan blade, a failing motor, or a broken tachometer feedback circuit. Accessing the service screen diagnostics is the first step to confirm whether the fan responds to commands and to read the actual pulse count being reported.

If the service screen shows the fan is operational with a speed reading between 1 and 50, the diagnostic focus shifts to mechanical causes: obstructions in the fan housing or duct path, and physical inspection of the fan blades for looseness, cracks, or missing segments. A blade that has separated from the hub will spin without moving adequate air volume, generating a low or erratic tachometer signal. If blockages and blade condition check out, the motor assembly or wiring harness between the motor and control board should be inspected for continuity and damage.

Source: manufacturer service documentation.

Common causes of U60

  1. 01

    Fan blade obstruction

    Wiring / connection

    Debris, grease buildup, or a foreign object lodged in the fan housing can physically slow or stall the blade, causing the tachometer reading to drop below 50 pulses per second. Inspect the fan area for blockages and clear any obstructions.

  2. 02

    Detached or damaged fan blade

    Part replacement

    A fan blade that has cracked, chipped, or separated from the motor hub will produce an inconsistent or low tachometer pulse signal even if the motor shaft is turning. Visually inspect the blade for missing sections, cracks, or hub separation.

  3. 03

    Cooling fan motor failure

    Part replacement

    A worn or failing fan motor may spin erratically or not at all, resulting in a tachometer reading outside the acceptable range in either direction. If the fan does not respond during service screen testing, the motor assembly likely needs replacement.

  4. 04

    Tachometer feedback circuit fault

    Wiring / connection

    The tachometer sensor or its wiring harness between the fan motor and control board can develop an open circuit or short, causing the board to receive a false pulse count. Inspect the wiring harness for damaged insulation, loose connectors, or broken leads.

  5. 05

    Control board signal failure

    Part replacement

    If the control board is not sending the correct speed command signal to the fan motor, the fan may operate outside its intended speed range and trigger U60. This is a less common cause and should be considered after mechanical and wiring causes are ruled out.

See the test procedure for each cause

Frequently asked questions about U60

What does U60 mean on a Dacor oven?
U60 indicates that the upper or single cooling fan has reported an abnormal tachometer reading at low speed. The control board expects a pulse signal between 50 and 750 pulses per second, and a reading outside that range triggers this fault. The cooling fan protects the oven's electronic components from heat, so this error should be diagnosed promptly.
Can I fix the U60 error myself?
Some causes of U60, such as clearing a fan obstruction or reseating a loose wiring connector, are accessible to a knowledgeable DIYer. However, diagnosing the exact cause requires accessing the oven's service screen to check the live tachometer reading, which may require familiarity with Dacor diagnostic menus. Motor replacement or control board repair should generally be left to a qualified technician.
Is it safe to use my Dacor oven while U60 is displayed?
Continued use of the oven with a non-functional cooling fan carries risk. The cooling fan protects internal electronics and control components from overheating. Operating the oven without adequate cooling can accelerate component failure or cause additional damage. It is best to resolve the U60 fault before regular cooking use.
Will resetting the oven clear the U60 error code?
A power reset may temporarily clear the U60 code, but if the underlying cause such as a damaged blade, blocked fan, or faulty motor is not corrected, the error will return during operation. Clearing the code through the service screen without fixing the root cause is not a permanent solution.
How much does it cost to repair a U60 cooling fan error on a Dacor oven?
Repair costs vary depending on the cause. Clearing a physical obstruction or reconnecting a wiring harness may involve only a service call fee, typically in the range of $75 to $150. Replacing the cooling fan motor or blade assembly can add $100 to $300 or more in parts and labor. Control board replacement, if required, is generally the most expensive repair and can range from $300 to $600 or higher depending on the model.

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