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Parts for Frigidaire FERB7800DS0 Dryer - AppliancePartsPros.comHere is the wiring diagram
http://manuals.frigidaire.com/p...df/Webster/134067000.pdf[COLOR="Blue"]Can anyone suggest a reason why the heating element stays on all the time whether or not the tim[/COLOR]er is on?
You may have two problems.
Power to the heater is shut off on one side (L1) by the time contacts A/B, the other side (L2) is shut off by the centrifugal switch (M1/M2) on the motor.
Could be that on of these is staying closed and that the heater coil is grounded.
I would start with the heating coil.
Unplug the unit and both wires to the coil.
Check it with a meter, should be around 12 ohms.
Then check from each side of the coil to the case/frame, both should be infinite ohms (open). If not the coil may have sagged or broken and is touching the case. This can cause it to run on.
Then put the timer off where the unit still heats.
Check from the timer side of the heating coil to L1, it should be infinite ohms.
If OK.
Check from the other side of the heating coil to L2, it should also be infinite ohms.
If you do not own a meter, I would suggest you purchase a one. You can get a decent digital multimeter for under $20.00. You do not need fancy though it is nice if the leads are a couple feet long.
If it saves ordering one unnecessary part it has paid for itself and you end up owning a useful tool.
Most places will not let you return electrical parts so if you order it, you own it.
A couple things to watch when measuring ohms and continuity
1. Always remove power from the machine otherwise you could blow your meter.
2. Always disconnect at least one side of any device you are checking. This eliminates the possibility of measuring an alternate/parallel circuit path.
3. When checking for closed contacts and continuity use the lowest scale (Usually 200 ohms). Then try higher scales. This scale is 0 to 200 ohms so if the device you are measuring is 300 ohms this scale would show an open circuit which it is not, you are just measuring outside the scale's dynamic range.
4. When you start always short the meter leads together. This will tell you that the meter is working and if there is any 0 offset.
There is a good STICKY at the start o
