Clothes dryer troubleshooting is worth the effort when you consider that a simple repair could cost hundreds less than a new machine. It can also save money on service calls, since you'll know exactly what to tell the repairman before he arrives. Even if you've never done it before, it's a fairly simple process. Just remember the first rule of servicing any appliance: unplug it before you start working.
Machine spins but there is no heat:
A number of things cause this problem.
Motor running, but drum isn't spinning
This is most likely a broken belt. Check the belt; if it is broken, replace it with an identical belt.
If the belt is intact then the dryer may have a bad roller. The roller is located underneath the tumbler. The roller is the part that the tumbler sits on, and over time it wears out. The roller is very simple to replace; you just remove the tumbler, take out the retaining clip on the roller, slide out the old roller and put in a new one.
The dryer could also have a bad motor or idler pulley. To determine if the pulleys are bad you must physically inspect them. Do they actually turn? Are they warped, worn or stuck? Then they need to be replaced.
Dryer is too hot
First, check the vents, both the lint trap and the vent on the house. A clogged vent is very dangerous. If you have a clogged vent, remove the entire blockage immediately. Built-up lint presents a fire hazard. If there's a lot of duct work between your dryer and the outdoors, you may need to hire a dryer duct cleaning professional to get rid of the blockage. Regular dryer cleaning prevents this from happening, so always clear the lint trap after using your dryer and never run a dryer without a lint trap or with a broken trap.
If the ductwork is clean, it's likely a malfunctioning thermostat or heating coil. Perform VOM tests on both to determine which one needs to be replaced.
The dryer is not drying
Check the power and the breaker for the clothes dryer. If the power is fine, then it could be one of the following:
When you know how to repair a dryer, you won't have to replace a dryer that can be fixed.
When it comes to drying clothes, the question is natural: Can a clothes dryer be green? The short answer is no. The long answer is maybe.