The following is a lint cleaning procedure from Westland Sales.  My 2100XC quit drying after almost 3 years of use and it seems the hot air discharge was plugged up.  This procedure cleaned it right up.  I perform this routine a couple of times a year now and no more problems.
1.	Start the unit without clothes and with the dry time off on cycle # 11. When the water stops entering the unit push and hold the start button until all the lights come on then release the button. *NOTE: If the water is not at least half way up the glass repeat this step.
2.	Move the cycle knob to cycle # 2 push the extra rinse button then press the start button once (do not hold) then let it run through that complete cycle. 
Do this 3 times then try the dryer.