Well, we are confused when you say your husband checked and got nothing. Do you mean he got no continuity of what he checked or that he found nothing wrong? Also you did not tell us what he checked. And, does the dryer run and produce only cold air, or does it not run at all?

So, let's start at the beginning.

First check the terminal block to see that you are getting 120v to each side of the connection.

Then check the thermal fuse/therostats for continuity.

Finally, check the heating coil for resistance and examine it for a break or for grounding.

Also, while doing all this clean out the blower/vent system.

That should do it, re post if you still need infor and what your results were for the above checks.