Since you indicated that you replaced the thermal fuse for a heating problem, I assume that you have a gas dryer. Check the gas supply cut-off valve to make sure that it is fully open. Make sure that you have an adequate gas supply provided to the dryer.
The wiring diagram for a gas HE3 dryer is shown in the image below with the heating circuit traced in red. A number of problems could be preventing the dryer from heating. You could have a failed wiring connection, a bad heater relay on the control board, a blown thermal fuse (do to an unresolved exhaust vent restriction), a bad high limit thermostat, a defective flame sensor, a bad igniter or a problem with the motor centrifugal switch.
I recommend that you check the thermal fuse first. This is the most common failure in the heating circuit of a gas dryer. If that fuse is blown again, I recommend that you carefully examine the exhaust air flow system for a clog or restriction. Also, wash the lint screen with water and a soft bristle brush. Fabric softener can build up on the lint screen and restrict exhaust air flow.
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These tips may help you resolve this dryer problem. If you have an electric dryer or need more assistance, reply with additional details and the full model number of your HE3 dryer.
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