To diagnose, start the machine empty, open the door and look inside quickly, or depress the door switch to see if the drum is turning. The dryer probably won't sound normal either. The clothes will simply be laying there in a big wet lump and they won't dry. In some machines, if the drum is not turning, there will be no noise or other external symptoms. Also check any flexible dryer vent for pinching. Feel the dryer vent exhaust (usually outside the house.) If there isn't a strong blast of air coming out, check the lint screen and open up any dryer vent you can get to to check for clogging. So most repairs stem from just a few common complaints: Air is being sucked through them, so they are under a vacuum.ĭryers are relatively simple machines they just don't have many components. Thus, the other components are not under pressure. (See Figure G-1) From the blower, the air goes directly out the dryer exhaust. In most models, the blower is the last component in the airflow system. The airflow system is discussed in section 2-5, except for drum seals, which are discussed in the chapter pertaining to your brand of dryer. Over a period of years, enough can build up enough to allow some of the above symptoms to occur. The lint screen traps most lint, but some does get through or leak out around the drum seals. This also prevents overheating of electric heating elements and accidental lint fires, and insures enough airflow to keep the gas burner operating properly.Īlso, drum seals can wear out and leak, which can disrupt proper airflow. A contact in the centrifugal motor starting switch assembly only allows the heating system to heat if the motor is running.Ģ-1(c) AIRFLOW, LINT FILTER AND EXHAUST SYSTEMĪirflow is EXTREMELY important in removing the moisture from the dryer drum thus the blower, vents and exhaust ducting must be kept as clean (translation: free of lint) as possible. This prevents overheating of the system or natural gas buildup in the dryer cabinet. There is also a safety system that prevents the heating system from starting at all unless the blower is turning. Finding the thermostats is discussed in the chapter pertaining to your model. Testing the temperature control system is discussed in section 2-4(c). This system uses several thermostats some adjustable and others a fixed temperature. Ignitor systems and holding coils on the gas safety valves have varied slightly over the years, but you can find the diagnosis and repair procedures for all gas burners covered by this manual in section 2-3.Ī temperature control system keeps the air at the optimum temperature for drying and prevents scorching of your clothes. Gas burners are remarkably similar in all the different brands. Electric heating elements come in many different configurations see the chapter about your brand for details. The heat source in household machines is either gas or electric. Warm air evaporates moisture much faster than cold air, so all dryers also have a heat source. 2-1(b) HEAT SOURCE AND TEMPERATURE CONTROL
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