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Error code reference

Amana Microwave Error Code Err2

Hardware problem with the high voltage board or wiring.

Amana codesAmana microwave codes

Hardware problem with the high voltage board or wiring.

First step from the service manual

Unplug oven for 1 minute, reconnect power, and retest. If code reappears, verify wiring at H.V. board; if wiring is good, replace H.V. board.

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

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What Err2 means on a Amana microwave

The Err2 code on an Amana microwave signals a hardware fault detected in the high voltage board or its associated wiring. The high voltage board is a critical component responsible for converting standard household current into the extremely high voltages required to power the magnetron, which generates the microwave energy used for cooking. When the control system detects an abnormality in this circuit, it locks out operation and displays Err2 to prevent further damage or unsafe conditions.

The most common triggers include a loose or corroded connector at the high voltage board, a failed board component, or wiring that has been damaged by heat or arcing. Because the high voltage circuit operates at potentially lethal voltages (often exceeding 2,000 volts DC at the capacitor), any compromise in the wiring or board can cause the control system to flag the fault immediately. Intermittent connections are particularly prone to generating this code, which is why a power cycle sometimes clears it temporarily.

Diagnosis begins with unplugging the unit for at least one minute to allow capacitors to discharge and the control board to reset. If the code returns after restoring power, the next step is a thorough visual inspection of all wiring connections at the high voltage board, checking for loose terminals, burned insulation, or signs of arcing. If the wiring checks out as intact and properly seated, the high voltage board itself is the likely failed component and will need replacement.

Source: manufacturer service documentation.

Common causes of Err2

  1. 01

    Loose or disconnected wiring at the high voltage board

    Wiring / connection

    Vibration over time or improper reassembly after prior service can cause connectors to work loose from the high voltage board. Inspect each connector for a firm, fully seated fit and look for any terminals that appear pulled back or corroded.

  2. 02

    Failed high voltage board

    Part replacement

    Internal components on the high voltage board, such as diodes or transistors, can fail due to age, power surges, or heat stress. If wiring inspects cleanly and the error persists, the board itself is the most probable defective component.

  3. 03

    Burned or damaged wiring insulation

    Part replacement

    The high heat environment inside a microwave can degrade wire insulation over time, leading to shorts or open circuits that trigger Err2. Look for discoloration, melted insulation, or visible arcing marks along any wiring routed near the high voltage circuit.

  4. 04

    Corroded connector terminals

    Wiring / connection

    Moisture or grease infiltration can cause the terminals at the high voltage board connector to oxidize, increasing resistance and causing intermittent or complete circuit faults. Corroded terminals often appear green or pitted and should be cleaned or replaced.

  5. 05

    Transient power surge

    Wiring / connection

    A brief voltage spike from the power line can cause the control system to register a false high voltage board fault. A one-minute power cycle allows the system to reset, and if the code does not return the surge was likely the cause.

See the test procedure for each cause

Frequently asked questions about Err2

What does Err2 mean on a Amana microwave?
Err2 indicates a hardware fault associated with the high voltage board or its wiring. The microwave's control system detected an abnormality in the circuit responsible for generating the high voltage needed to power the magnetron. The oven shuts down to prevent unsafe operation. Diagnosis starts with a power reset and moves to wiring inspection and possible board replacement if the code returns.
Will resetting the microwave clear the Err2 code?
Unplugging the microwave for one minute and restoring power can clear Err2 if the fault was caused by a temporary condition such as a power surge or a momentary communication error. However, if an underlying hardware problem exists with the high voltage board or wiring, the code will return after reset. A persistent Err2 after a reset requires physical inspection of the wiring and board.
Is it safe to use my Amana microwave when it shows Err2?
No, you should not attempt to use the microwave while Err2 is active. The code indicates a fault in the high voltage circuit, which operates at voltages that can be lethal. The oven disables itself as a safety precaution, and bypassing or ignoring that lockout is dangerous. Keep the unit unplugged until the fault is properly diagnosed and repaired.
How do I fix the Err2 error on my Amana microwave?
Start by unplugging the microwave for one full minute, then reconnect power and test. If Err2 returns, the next step is inspecting all wiring connections at the high voltage board for loose terminals, corrosion, or burned insulation. If the wiring is intact and properly connected, the high voltage board itself needs to be replaced. Due to the lethal voltage hazards inside a microwave, this repair is best performed by a qualified technician.
How much does it cost to repair an Amana microwave showing Err2?
Repair costs vary depending on whether the fix is a simple wiring reconnection or a full high voltage board replacement. A board replacement, including parts and labor, typically ranges from around $100 to $250 or more depending on the specific model and local service rates. If the microwave is older or a lower-cost model, comparing repair cost to replacement cost is worth considering before proceeding.

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