Kenmore elite gas dryer model 110.72942100 - replaced many parts at this time still not running. Push to start button - turns off dryer when let go, no heat.
Timer doesn't make ticking sound.

Replaced timer, replaced thermistor and thermal fuse - motor relays show 123 on electric tester ughh - out since sept, very frustrated. Thought timer went so replaced that and then cleaned underside out - no heat dryer only spins when push to start is held

Is it the push to start - but what regulates the heat - EVERYTHING has been cleaned out - nothing is blocked. NOW WHAT

You have to use a meter to find where the circuit is open. It should only take a few minutes to find this by putting one lead on a prong of the power cord and the other along the circuit for the gas valve. Learn to use a meter as it will save you from just being a "parts-changer." You will never be a good trouble-shooter if you rely on changing parts because there are way too many variables that have nothing to do with the parts.

Door switch