Summary
Using the provided service manual for the Whirlpool Amana Model PALE866SAC Electric Dryer, the document provides detailed diagnostic guides and troubleshooting procedures focusing on component testing and key electrical parts. The Heater Circuit, including the thermal fuse, high-limit thermostat, and heating element, is critical for diagnosing heating issues. Technicians should check the continuity of the thermal fuse, which is designed to open at 360°F (182°C) and reset automatically at lower temperatures. The heating element should be tested using a multimeter, with a resistance value expected between 9.43 and 10.01 ohms. If the element shows an open circuit, replacement is necessary.
The moisture sensor board plays a significant role in automatic drying cycles. It uses metal strips in the lint filter housing to detect clothing moisture levels, and the timer advances only when the moisture content is low enough. The tech sheet outlines a self-test function for the moisture sensor: connecting a jumper wire between specified terminals should produce three audible signals, confirming sensor operation. Additionally, the signal switch allows for volume adjustments and can be tested through jumper connections, ensuring correct functionality for low, medium, and high signal tones.
Routine maintenance for this model includes verifying the integrity of the ventilation system to avoid airflow restrictions. Blockages in the lint filter or exhaust duct can cause overheating, reducing the dryer’s efficiency and potentially triggering the thermal cutoff. Technicians are advised to inspect and clean the venting regularly to maintain optimal performance and avoid unnecessary component failures.
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