Kenmore gas dryer won' dry clothes all the way

Dryer Repair
1

I have a Kenmore elite HE3 gas dryer and I can’t figure out why it won’t dry clothes all the way.
I’ve checked to make sure there are no clogs in the exhaust path. it’s clean. Plenty of air comes out the exhaust, but it never really gets that warm.
I’ve replaced the coils and the thermistor.
I’ve replaced the moisture sensor bars.
I’ve replaced the gas valve.
I’ve checked the flame sensor and high limit switch for correct resistance/continuity.
The dryer will start and ignite, but the flame will shut off and come back on. I’m not sure how long/often the flame is supposed to cycle.
It doesn’t matter if I use sensor drying cycles or timed dry cycles and the duration or temp setting seem to make no difference. Clothes really never get dry.
Could it be the computer module?
If Anyone can help i would appreciate it. Thanks.

G

3

Based on some other related threads, I have now also replaces the ignitor, flame sensor and high limit thermostat . I really thought it was the high limit because when I bypasses it the flame stayed on and the dryer got hot. Then I tested it in the oven and at only 200 degrees I lost continuity. That should have been it right? Wrong. Replace the high limit thermostat. Same problem. Flame comes o for ten seconds then goes off. So I got inside and double check the entire exhaust path; I even took out the blower wheel to make sure there were no blockages deep inside.

The only thing I can think of now is the computer control board. I’d love if someone wold confirm that this could be the problem cause it cost like 300 bucks. I’m out of ideas and things to replace.