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Error code reference

Fisher & Paykel Refrigerator Error Code 40

Icemaker solenoid transistor 1 short circuit; a transistor on the controller that drives the icemaker…

Fisher & Paykel codesFisher & Paykel refrigerator codes

Icemaker solenoid transistor 1 short circuit; a transistor on the controller that drives the icemaker solenoid has failed, possibly due to a fault in the solenoid.

First step from the service manual

Check the solenoid resistance (refer to Section 5.6). If not within limits, replace the solenoid. Check wiring and connections at the solenoid and module. If OK, replace the power/control module.

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

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What 40 means on a Fisher & Paykel refrigerator

Error code 40 on a Fisher & Paykel refrigerator indicates a short circuit condition in the transistor on the power/control module that drives the icemaker water inlet solenoid. This transistor acts as an electronic switch, controlling current flow to the solenoid coil on command. When the module detects that the transistor has failed in a shorted state, it logs error code 40 and disables the circuit to prevent further damage. The fault can originate either within the transistor itself or be triggered by an overcurrent condition caused by a problem in the solenoid it controls.

The icemaker solenoid is an electromagnetic coil that opens the water inlet valve to allow water into the icemaker during the fill cycle. If the solenoid winding develops an internal short, it draws excessive current through the control transistor, which can cause the transistor to fail. This is why the diagnostic sequence begins with measuring solenoid resistance as outlined in Section 5.6 of the technical documentation. A solenoid that reads outside the specified resistance limits is a strong indicator that the solenoid caused the transistor failure, and replacing only the module without addressing the solenoid would likely result in repeat failures.

Wiring and connector integrity between the solenoid and the power/control module must also be inspected. Chafed insulation, pinched wires, or corroded connector pins can create a low-resistance path that mimics a solenoid short and stresses the transistor. If solenoid resistance is within limits and the wiring shows no faults, the transistor failure on the power/control module is the root cause and the module requires replacement.

Source: manufacturer service documentation.

Common causes of 40

  1. 01

    Failed icemaker solenoid (water inlet valve)

    Part replacement

    A shorted winding inside the solenoid coil causes excessive current draw, which burns out the driver transistor on the control module. Measuring solenoid resistance per Section 5.6 and finding a value outside the specified limits confirms this cause.

  2. 02

    Failed driver transistor on the power/control module

    Part replacement

    The transistor responsible for switching the solenoid circuit can fail on its own due to age or manufacturing defect. This is confirmed when solenoid resistance and wiring check out within specification, yet the error persists.

  3. 03

    Damaged or shorted wiring harness

    Wiring / connection

    Chafed, pinched, or crushed wires between the solenoid and the control module can create a low-resistance short that triggers the same transistor fault. Inspect the full wiring run and connector pins for visible damage or corrosion.

  4. 04

    Corroded or loose connector at the solenoid or module

    Wiring / connection

    Poor connector contact can cause intermittent arcing or resistance changes that stress the driver transistor over time. Inspect both the solenoid connector and the module harness connector for corrosion, bent pins, or loose fit.

See the test procedure for each cause

Frequently asked questions about 40

What does 40 mean on a Fisher & Paykel refrigerator?
Error code 40 indicates that the transistor on the power/control module responsible for driving the icemaker water inlet solenoid has failed in a short circuit condition. The fault can be caused by the solenoid itself drawing too much current, damaged wiring, or an internal failure of the transistor. The refrigerator will typically stop ice production until the fault is corrected. Diagnosing the root cause requires checking solenoid resistance before deciding whether to replace the solenoid or the module.
Can I fix error code 40 on my Fisher & Paykel refrigerator myself?
A knowledgeable DIYer can perform the initial diagnostics, including checking the solenoid resistance and inspecting wiring and connectors for damage. If the solenoid resistance is out of range, replacing the water inlet solenoid is a manageable repair. However, if the power/control module itself needs replacement, this is a more involved repair that requires care when handling electronics and ensuring the correct replacement module is used.
Is error code 40 on a Fisher & Paykel refrigerator a safety concern?
Error code 40 is primarily a functional fault affecting ice production rather than a safety emergency. The control system detects the shorted transistor and disables the circuit, which helps prevent further electrical damage. Your refrigerator's cooling and food preservation functions should remain unaffected. That said, a confirmed electrical short in any appliance component should be diagnosed and repaired promptly rather than ignored.
How much does it cost to repair error code 40 on a Fisher & Paykel refrigerator?
Repair costs depend on which component is at fault. A replacement icemaker water inlet solenoid typically falls in the range of $20 to $80 for the part alone. A replacement power/control module is a more expensive component, generally ranging from $150 to $400 or more depending on the specific model. Adding professional labor costs will increase the total, typically by $100 to $200 depending on your location and service provider.
Will resetting my Fisher & Paykel refrigerator clear error code 40?
A simple reset will not permanently clear error code 40 because the fault is caused by a hardware failure, either in the solenoid, the wiring, or the control module transistor. The code will return as soon as the refrigerator attempts to run the icemaker fill cycle again. The underlying defective component must be identified and replaced before the error will clear and stay clear.

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