Hi, I have a Samsung Gas Dryer Model DV42H5000GW/A3. It was briefly turning on and then turning off with the HE error code (for a heat issue). After a few cycles of this it just stopped turning on, and the display went straight to HE. I took everything apart (it was fairly dirty, but not fully clogged). I ohmed out the Thermistor (proper at 12K), the ignitor (proper at 60), and did connectivity checks on the flame sensor, thermostat, thermal limit fuse and all checked. Cleaned everything, put back together the electronics, and same result. Out of ideas. Control board seems unlikely given the “gradual” problem and the dirtiness of the vent. Gas line seems unlikely given it doesn’t even try to turn on. Any other things to try?