The dryer circuit control board controls most of the operations within the dryer. If the control board is bad, the dryer may not start or the dryer will not heat up.
Before proceeding any further always disconnect the electricity before working on any electrical appliances. Disconnect the electricity to the dryer. This can be done by pulling the plug from the receptacle or by flipping the breaker off. Make sure the electricity is turned off to the dryer. USE EXTREME CAUTION! YOU ARE WORKING WITH 220 VOLTS.
When replacing the bad dryer control board with a new control board, it is a good practice to have the new replacement circuit board out of its packaging or box and to hold it in front of the old board so that you can examine both of the dryer circuit boards and make certain that they are the same before pulling any wires loose from the existing board and replacing it.
If you are not familiar with all of the wires that are connected and will need to be disconnected and transferred from one board to the other, have your phone handy and snap a few good photos of the bad control board while it is still connected in your dryer control panel for future reference, if needed.
Now that you are sure that both of the boards are the same you can transfer the wires from the old board to the new control board.
Once you have transferred all of the wires from the old control board to the new replacement control board you will need to replace the dryer console or control panel, plug the power cord back in. You may need to program the new dryer control board, following the instructions for the make and model of your dryer.
The control board in your dryer has a life span just like any other household appliance parts do and can wear out from use and age. Lightning storms/strikes cause a lot of havoc on appliances and are responsible for damage to many circuit boards. Electrical power surges and flood waters or just moisture/condensation can also be to blame for a faulty dryer circuit control board.
If you overload your dryer you may be asking for trouble. Putting too many clothes in your dryer may actually damage it and possibly burn out the dryer motor.
If your dryer shakes, vibrates, rattles or even tries to move around the room, it could be that the legs on the dryer are uneven or the floor surface is unstable but most likely it is because you have over loaded it, too many clothes!!
A number of dryers have different settings and cycles for a variety of times, fabrics and item options. If you use the Air Dry or Air Fluff cycle and it leaves your clothes damp it is because not enough heat was produced to dry the clothes, using the wrong cycle and time setting can leave the clothes damp, also piling too many clothes into the dryer will prevent the clothes from tumbling freely and therefore prevent them from drying. If the dryer has a dryness sensor the sensor may overload if the clothes are not able to dry adequately. The sensors then would malfunction or stop working.
The dryer motor could possibly burn out prematurely if you continue to overload it because it puts a strain on the dryer.
If you are overloading your dryer on a regular basis, that can eventually cause the system to overheat and cause damage to the unit.
If your dryer is making a loud growling noise and sometimes buzzes when the start button is pushed or sometimes the motor shuts off before the cycle is completed then you may have a problem with the motor.
Always remember to clean the dryer lint filter after each load and it is helpful to keep lint from covering the motor which could cause it to overheat and burn out.
If the dryer is humming after pressing the start button and you cannot turn the drum by hand it is likely your motor has burned out and will need to be replaced.
Caution: Always remove/disconnect the power source from the unit you are working on. Unplug it! When unplugging or removing the power source, double check to make sure you removed the proper cord or turned off the proper breaker.
Check to see if the motor will rotate freely and run it with the belt removed and blower in place. If the motor runs good without the belt then the problem maybe the idler pully or drum. If the drum cannot rotate fully with the belt on, you may need to replace one or possibly both of these parts. If you have to hold the start button down for a couple of seconds, this is most likely the sign of a burned out or bad motor which will need to be replaced.
If your dryer will start but then stops after just a few minutes then your problem maybe a malfunctioning thermal overload detector which is mounted on the motor and heater box.
Perhaps the motor hums but does not rotate even with the belt removed, but you can still turn the drum by hand, you may have to replace the motor or motor start capacitor.