Amana Oven F3: Temperature Sensor Open Circuit
F3 on an Amana oven means the oven temperature sensor (RTD probe) reads infinite resistance. The circuit between the sensor and the ERC board is broken — either the sensor element fractured, the wiring has a break, or a connector has separated.
Sensor Function and Location
The RTD (Resistance Temperature Detector) is a thin metal probe mounted in the upper-rear wall of the oven cavity, secured by one or two screws. A two-wire harness exits through the rear oven wall to the ERC board. The board sends a small current through the sensor and measures resistance to calculate temperature.
Expected resistance at room temperature: approximately 1,080 ohms at 70 degrees F. The resistance increases linearly with temperature — 1,500 ohms at 350 degrees F, 1,750 ohms at 500 degrees F.
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Combustion analyzer ($300), igniter tester ($120), temperature calibrator ($150), and gas pressure manometer. Our technician arrives with $15K+ in professional tools — your diagnostic is free.
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Amana-Specific Sensor Considerations
Amana ovens use the same RTD sensor design as the entire Whirlpool platform, but Amana's simpler cavity design means the sensor is often more exposed to direct heating element radiation. The sensor tip may be positioned closer to the broil element than in premium models, causing more thermal stress on the sensor over its lifetime.
Diagnostic Steps
1. Measure Sensor Resistance
Unplug the oven. Access the sensor connector at the rear panel. Disconnect. Measure across the two sensor leads: expect ~1,080 ohms at room temperature. Infinite/OL = confirmed open circuit.
2. Check Wiring If Sensor Tests Good
If the sensor reads 1,080 ohms but the code persists, measure continuity of each harness wire from sensor connector to ERC board connector. The harness passes through the oven rear wall — thermal cycling at this penetration point can fatigue the wire over many years.
3. Board Input Check
If both sensor and wiring test good, the ERC board's analog input has failed (uncommon but possible).
Safety First — Know the Risks
Gas ovens involve live gas lines — a loose connection creates explosion and carbon monoxide risk. Electric ovens run on 240V circuits. Our techs are licensed and insured — let them handle the risk.
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Replacement Procedure
- Unplug oven. Pull from wall for rear access.
- Inside the oven: remove the 1-2 screws holding the sensor probe.
- Gently pull the probe out through the rear wall.
- Disconnect the connector at the rear.
- Connect new sensor. Thread through wall. Secure screws.
Part: WPW10181986 (same across Whirlpool platform), $12-25.
Caution: Do not bend the probe sharply — the RTD element inside is fragile.
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Post-Replacement
Run a calibration bake at 350 degrees F for 30 minutes with a thermometer. New sensors are factory-calibrated but verify the oven reads within 25 degrees of target. Adjust calibration offset if needed.
The Real Cost of DIY
Average DIY attempt: $150-400 in tools you may use once, plus the risk of further damage. Our diagnostic visit costs $0 — we find the problem and give you an honest quote.
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Impact on Cooking
Without the sensor, the Amana oven will not activate either the bake or broil element. The oven is completely non-functional for cooking until the sensor is replaced. The cooktop (on range models) continues to work since it operates independently of the oven sensor.
Cost
Sensor: $12-25 DIY. Professional: $90-160. This is one of the cheapest and simplest oven repairs. Most homeowners comfortable with basic tools can do this in 15-20 minutes.
Amana oven not heating with F3? Temperature sensor replacement is a 15-minute fix. Book today.
