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Error code reference

Amana Dryer Error Code 2

Thermistor open sensed

Amana codesAmana dryer codes

Thermistor open sensed - the thermistor resistance is very high.

First step from the service manual

Check for low ambient temperature in room (below 50°F/10°C), outside vent damper stuck open in wintertime, loose or open wire terminals, and check thermistor resistance.

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

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What 2 means on a Amana dryer

Error code 2 on an Amana dryer indicates a thermistor open condition, meaning the control board has detected an abnormally high resistance value from the thermistor circuit. The thermistor is a temperature-sensing component that changes its electrical resistance in response to heat. Under normal operating conditions, the thermistor presents a measurable, predictable resistance to the control board. When the resistance climbs beyond the expected range, the board interprets this as an open circuit and triggers code 2 to halt operation and prevent unsafe temperature conditions.

The most common root causes fall into two categories: environmental and electrical. On the environmental side, ambient room temperatures below 50 degrees Fahrenheit (10 degrees Celsius) can cause the thermistor to read higher resistance than expected, since thermistor resistance increases as temperature drops. A vent damper stuck open during cold weather allows frigid outside air to enter the duct system, cooling the thermistor and producing a falsely high resistance reading. On the electrical side, loose or corroded wire terminals in the thermistor circuit can introduce additional resistance or create a fully open circuit, mimicking a failed thermistor.

To properly diagnose this code, start by ruling out the environmental causes, then inspect all wiring connections at the thermistor and along the circuit path to the control board. If connections are tight and ambient temperature is not a factor, measure the thermistor resistance directly with a multimeter and compare the reading to the specified values for the operating temperature. A thermistor with resistance far outside the expected range at room temperature should be replaced.

Source: manufacturer service documentation.

Common causes of 2

  1. 01

    Low ambient room temperature

    Wiring / connection

    If the laundry area is below 50 degrees Fahrenheit (10 degrees Celsius), the thermistor will naturally read very high resistance, triggering this code. Warming the room and retesting will confirm whether this is the cause.

  2. 02

    Outside vent damper stuck open in winter

    Wiring / connection

    A vent damper that fails to close allows cold outdoor air to flow back into the dryer duct, dramatically lowering the thermistor temperature and producing an elevated resistance reading. Inspect the damper for debris, ice buildup, or mechanical failure.

  3. 03

    Loose or open wire terminals in thermistor circuit

    Wiring / connection

    A disconnected or corroded terminal at the thermistor connector or along the wiring harness can create an open circuit that the control board reads as extremely high resistance. Inspect and reseat all connectors in the thermistor circuit.

  4. 04

    Failed thermistor

    Part replacement

    The thermistor itself may have developed an internal open, causing its resistance to read far above the expected value regardless of temperature. Confirm with a multimeter resistance check and replace the component if the reading is out of specification.

See the test procedure for each cause

Frequently asked questions about 2

What does 2 mean on a Amana dryer?
Error code 2 on an Amana dryer means the control board has detected a very high resistance value from the thermistor, which is the temperature sensor used to monitor heat inside the dryer. The code is triggered when that resistance climbs beyond the normal operating range, which the board treats as an open circuit. Possible causes include a cold installation environment, a stuck vent damper letting in cold air, loose wiring, or a failed thermistor.
Can I fix error code 2 on my Amana dryer myself?
Some causes of error code 2 are DIY-friendly. Checking whether the room temperature is below 50 degrees Fahrenheit, inspecting the exterior vent damper for obstructions, and reseating loose wire connectors at the thermistor are all tasks a careful homeowner can perform. If those steps do not resolve the issue, testing thermistor resistance with a multimeter and replacing the component if necessary is a moderate repair that experienced DIYers can handle.
Is it safe to run my Amana dryer when error code 2 is displayed?
It is not recommended to continue running the dryer while error code 2 is active. The thermistor is a key safety component that helps prevent the dryer from overheating. Without a reliable temperature reading, the control board cannot properly regulate heat, which could create a fire hazard over time. Address the underlying cause before resuming normal use.
How much does it cost to fix error code 2 on an Amana dryer?
If the cause is environmental, such as a cold room or a stuck vent damper, there may be no parts cost at all. A replacement thermistor typically costs in the range of $10 to $40 for the part alone, depending on the specific model. If a technician is needed for diagnosis and repair, expect to add labor costs in the range of $75 to $150 or more depending on your location.
Will resetting my Amana dryer clear error code 2?
Resetting the dryer may temporarily clear the code, but if the underlying problem is not corrected, the code will return. A reset does not fix a failed thermistor, a damaged wiring connection, or a stuck vent damper. It is best to diagnose and correct the root cause before attempting a reset so you can confirm the repair was successful.

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