What do error codes FDL and R11 indicate?

First thing to do is try getting error codes from the ECM. Possible that the ECM is faulty or will throw a code that might tell you what to look for. How does it run normally? Did it exhibit rough idle, loss of power and lousy fuel economy? Next question - have the coil packs ever been replaced? Ignition coil packs have a typical life of about 10 years before they start breaking down. This is just a stab in the dark but maybe test the packs.

Check to see if outside unit coil is dirty and clean with water .
Make sure unit is turn off

ELECTRIC Dryer no heat or little heat, or shuts down to fast:

Check your venting and lint basket. Check blower for lint build up and blower wheel obstruction., test by trying to turn the wheel manually by hand (should be easy) May have to remove cabinet or front/back plate to get to it)

Next check the heating element itself with a meter for continuity OHMS CLOSED CIRCUIT. If not its defective or has a short if its grounding out? Which in turns causes blown fuses or thermostats or overheating.

Check dryer Terminal block prongs both outside prongs should give combined 220, and 110 each if u check 1 outside & 1 center (ground) prong. Also check house electrical outlet for full voltage. 220 because if u only get half or 110 volts you will be able to run the machine which uses only 110 to run motor but not the heater which uses a full 220,

Check the thermal cut off, the cycling and the hi limit thermostats.
For continuity or OHMS. If no ohms or resistance they need replacement.

In some dryer's the control panel relies on a thermistor rather than a CYCLING thermostat to regulate the drum's air temperature by monitoring the component's resistance changes; resistance goes down as temperature increases and up when temperature decreases. Once the drum's air temperature reaches a certain level required to dry clothes, the control panel shuts off the heater. The panel will turn the heater on again and begin another heating cycle when the thermistor indicates that more heat is needed to keep the air temperature constant inside the drum

Lastly check your moister sensor. ( located inside the dryer door usually) Especially if machine seems to shut down early and clothes are still wet.
Test with a meter at room temperature and it should show continuity.
A failed moisture sensor will affect the dryer run time in the automatic moisture sensing cycle but it will not affect the heating of the dryer or the timed cycle. Which are reflected by the thermostats.

Read more :http://www.ehow.com/info_12203962_check-dryer-thermistor.html

Verify no lines to vaccine switch is kinked or unplugged.check YouTube.

Fdl error code means a "door lock error code".
This error shows up because the door cannot be locked. The door will try to lock six times before displaying the error code. In order to solve it, your door lock switch needs to be replaced.

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Your door lock switch needs to be replaced... Fdl is a door lock error.code. This error shows up because the door cannot be locked. The door will try to lock six times before displaying the error code

You can order a new part replacement from the Sears PartsDirect website.

Hope helps.

If the door fails to lock after six (6) attempts "Fdl" will display. The "Fdl" error code indicates the door failed to lock or the control does not detect the door being locked. The likely failure is the door lock mechanism. There is always a chance there could be a loose wire connection between the door lock mechanism and the Central Control Unit (CCU) causing the error too.

If the door fails to lock after six (6) attempts "Fdl" will display. The "Fdl" error code indicates the door failed to lock or the control does not detect the door being locked. The likely failure is the door lock mechanism. There is always a chance there could be a loose wire connection between the door lock mechanism and the Central Control Unit (CCU) causing the error too.

f the door fails to lock after six (6) attempts "Fdl" will display. The "Fdl" error code indicates the door failed to lock or the control does not detect the door being locked. The likely failure is the door lock mechanism. There is always a chance there could be a loose wire connection between the door lock mechanism and the Central Control Unit (CCU) causing the error too.

I added the instructions in the image below on how to remove and replace the door lock mechanism. NOTE: Disconnect the power cord from the power source before removing and replacing the door lock assembly.

F11 = Communication between the Central Control Unit (CCU) and the
Motor Control Unit (MCU) cannot be sent correctly.
.
1. Unplug washer or disconnect power.
2. Check wire harness connections to the MCU, the motor, and
Central Control Unit (CCU).
3. Check the drive system for any worn or failed components.
4. Plug in washer or reconnect power.
5. Verify CCU operation by running a Diagnostic test or any
cycle.
6. Check the MCU by looking for operations of the drive motor.
7. Check the drive motor for powered rotations.
8. Check that the serial harness at the MCU is not mounted
upside down. The wires should be to the left when facing the
MCU connectors.

FDL=
A Door Lock Error occurs if the door cannot be locked. It will try to lock
it six times before displaying the error code.
Le code d’erreur “Verrouillage porte” apparaît s’il n’est pas possible de verrouiller la
porte. Le système effectue six tentatives de verrouillage avant d’afficher le code d’erreur.
■ Door lock mechanism is broken or removed from door.
■ Door switch/lock unit failure.
1. Unplug washer or disconnect power.
2. Check door switch/lock unit.
3. Check the wire harness connections to the door
switch/lock unit and Central Control Unit (CCU).