CLothes are taking way too long to get dry...

So I've gone through the available troubleshooting guides for our dryer. I've tested all of the sensors, the heating coil continuity, the sensors, totally cleared all lint from the exhaust, refit the exhaust hose. It usually takes upwards of 2 hours to dry a load of clothes.

With clothes in the drum I don't see temperatures higher than about 110F. Usually. Every once in a while I see it around 150F, which is where it's supposed to be. I'm using the thermometer probe that came with my automotive multi-meter, FYI. It's accurate.

I was under the impression that heating elements either work or don't, but all signs point to ours being bad. Before I spend $150 on a new assembly, can anyone verify this is the likely culprit?

One other thing of note - a few weeks ago, we think around the time the dryer started acting up, we got a new roof on the house. The dryer vent exhaust is through the roof. Worth having the roofer come back out and inspect?

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Please give us your model number. Some dryers have two heating coils. Mine did this same thing and one was burned out.

Causes for Dryer takes too long

Cause 1

Air Flow Problem

If the vent is clogged or partially clogged, it will restrict the airflow through the dryer, substantially increasing the drying time. To ensure proper dryer performance, you should clean your dryer’s venting system at least once per year.

Cause 2

Blower Wheel

The blower wheel works with the drive motor to draw air into the dryer drum. Clumps of lint, socks, and small articles of clothing can escape the lint filter and get caught in the blower wheel. In addition, the blower wheel sleeve can wear out, allowing the blower wheel to wobble on the motor shaft. If the blower wheel is obstructed or defective, it may take too long to dry clothes. To determine if the blower wheel is working properly, remove the dryer vent and assess the strength of the air flow. If the air flow is weak, check the blower wheel for obstructions. If no obstructions are present, try rotating the blower wheel by hand. If the blower wheel wobbles as it turns, replace it.

Cause 3

Heating Element

The heating element warms the air before the air enters the dryer drum. If the heating element is burned out, or if any other part of the assembly is defective, the dryer may not heat. To determine if the heating element is at fault, use a multimeter to test it for continuity. If the heating element does not have continuity, replace it.

Cause 4

Heating Element Assembly

The heating element assembly warms the air as it passes over. If the heating element is burned out, or if any other part of the assembly is defective, the dryer may not heat. If the dryer doesn’t heat, the dryer will take a substantial amount of time to dry clothes. To determine if the heating element is at fault, use a multimeter to test it for continuity. If the heating element does not have continuity, replace it.

Cause 5

Moisture Sensor

The moisture sensor monitors the clothing’s moisture level and sends a signal to the control board when the clothes are dry. If the moisture sensor is malfunctioning, it could inaccurately report that the clothing is still moist, causing the dryer to keep running even though the clothes are dry. However, this is rarely the case. Before replacing the moisture sensor check all the more commonly defective parts. If you have determined that all of the other components are working properly, replace the moisture sensor.

Cause 6

High Limit Thermostat

The high-limit thermostat monitors the dryer temperature and shuts off the burner if the dryer overheats. If the high-limit thermostat is malfunctioning, it may shut off the burner even if the dryer is not overheating. However, this is rarely the case. Before replacing the high limit thermostat check all the more commonly defective parts. If you have determined that all of the other components are working properly, test the thermostat by using a multimeter to test it for continuity. If the thermostat does not have continuity, replace it.

Cause 7

Cycling Thermostat

The cycling thermostat cycles the heat on and off to regulate the air temperature. If the cycling thermostat is defective, the dryer will not heat. However, this is rarely the case. Before replacing the cycling thermostat check all the more commonly defective parts. If you have determined that all of the other components are working properly, test the thermostat by using a multimeter to test for continuity. If the thermostat does not have continuity, replace it.

Cause 8

Thermistor

Some dryer models have a thermistor. The control board uses the thermistor to monitor the dryer temperature and cycle the heat on and off. If the thermistor is defective, it might not cycle the heat on, causing the clothes to not to dry properly.

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