I'm a new forum user. I've replaced the coils and one thermostat on the outflow side that wasn't showing continuity. I've checked the continuity on the others as well as the bk-r and tm-or on the timer (all good), but the dryer doesn't heat and the timer doesn't advance in the autosense mode. It does advance, but still doesn't heat in the low-heat mode. It had been getting very hot in the low-heat mode about every third cycle before I replaced the above items. Any ideas? Thanks in advance!

Does the ignitor glow? If not, check continuity of ignitor. Usually reads 40-100 ohms at room temp. If it seems to read ok, check for 120vac at ignitor connector when dryer set to normal heat cycle. Door must be closed or door switch bypassed. Did you check thermal fuse? If no 120vac between thermal fuse and ground with dryer on, backtrack to timer. (operating thermostat, thermal cutoff, hi limit thermostat, timer).

Eric