This weekend I spent way too much time with my dryer! Now it is a point of pride to prove to myself and my wife that I can fix this darn thing! I have an LG Tromm gas dryer model number dlg7188rm, We have replaced the gas valve coils, the thermistor, and the ignitor in the last week, but it is still not working properly. It comes on and ignites the flame and heats up, however the cooling light stays on the whole time and it takes two to three cycles to dry small loads. I believe the main control board is what must be bad but I am wondering if you think it is something else, or if there is a way to test the board? We have tested all the fuses and they are closed, one was tripped and we reset it. The vent is all clear all the way to the house and blowing out warm but not hot air. Any help would be great, getting pretty frustrated with this project!