The following link explains how to troubleshoot a dryer
no heat problem:http://www.fixya.com/support/r630242-dryer_runs_but_not_heat
First, begin by unplugging the dryer and verifying the voltage at the wall receptacle. You should read 220-240VAC across the two Hot terminals (left and right slots). If the voltage is incorrect, check to make sure you don't have a breaker tripped. Some homes
use 2 separate 120VAC breakers to provide power to the receptacle vice using one 240VAC breaker.
If the voltage IS correct, leave the dryer unplugged and remove the cover plate on the terminal block in the back of the dryer (this is where the power cord is installed). Plug the dryer back in and take a voltage reading
across the two hot (RED and BLACK) wires at the terminal block. You should read 220-240VAC. If the voltage is good, you have an internal heating problem. If the voltage is bad at the terminal block, but good at the receptacle, you have a bad power cord.
The reason a dryer will still run if the input voltage is incorrect, is because the drive motor only uses a portion of the 220 service. The motor runs off 110-120VAC, while the heating circuits require 220-240VAC. So, if you are missing 1/2 your input voltage due to a tripped breaker or bad power cord, your dryer will exhibit these symptoms.
If you determine the problem to be internal, the heating circuits will either be located in the rear of the washer
on the right hand, or under the dryer drum on the right hand side. Usually, an easy way to determine is by the location of the lint screen filter. If the filter is on top of the dryer, the heating circuits are in the back of the dryer. If the lint screen is in the door, the heating circuits are located under the dryer drum. All dryers
are not constructed the same. Regardles of location, the Heating Element is located inside the heater
box. The Thermal Cut-Out (TCO) will be located on the outside of the heater
box on the end opposite the heating element terminals. The Hi-Limit Thermostat
will be located adjacent to the heating element terminals. If either the TCO or Hi-Limit Thermostat
are determined to be bad, replace both components at the same time. That is why these components are commonly sold as a set. Failure to do so may result in premature failure of any parts you replace. All these parts can be found at appliancepartspros.com, searspartsdirect.com, pcappliancerepair.com, or repairclinic.com. The average cost of these components varies, so shop around for the best price
If you have any questions, please let me know. Please inlcude your complete model number (located on a nameplate around the door opening) when asking questions. I hope you find this information helpful.
NOTE: On some dryers, the TCO may be referred to as a "Thermistor".