I understand your concern, it's hard to dry clothes when the dryer is not producing any heat. Based on your symptom there could one of many possible failures. The first and easiest thing to do is to locate the two house circuit breakers dedicated for your dryer and reset both circuit breakers. Reset both breakers by flipping them both OFF and back ON 2-3 times and then restart your dryer and wait to see if it heats.
If it continues to run and not heat then the voltage supply should be tested and verified for 220 volts.
NOTE: I do not recommend checking voltages unless you have experience and feel safe and confident in doing so, otherwise I recommend calling a service technician to diagnose and repair your dryer.
If the voltage supply is correct then you will need to disconnect and check the following components for continuity using an ohm meter:
Heat switch (key#13) Disconnect the red wires and check for continuity across the two terminals on the switch.
Operating thermostat (key#42)
Thermal cutoff (key#47) Disconnect the Red and Red wire with the White stripe and check for continuity across the two terminals on the thermal cut off.
Hi Limit thermostat (key#48) Disconnect the Black and the Red wire with the White stripe and check for continuity across the two terminals on the hi-limit.
Heating element (key#14) Disconnect the Red wire with the White stripe and the Red wire from the heating element and check for continuity/ohms across the two terminals on the heating element. It should measure between 7.8 and 11.8 ohms of resistance.
NOTE: Disconnect the power cord from the power source before removing the lower access panel and console.
If you do not feel confident repairing this problem yourself, then you can have it repaired at your home by a Sears technician. Here is a link for the website:
Sears Home Services