We have the Whirlpool GGW9200LT1 natural gas dryer. It has been taking 90+ minutes to dry a load of clothes. It's about 10 years old, we were told, and we recently acquired it from a friend. We have been down the line with troubleshooting and don't know what to try next.
The dryer has been disassembled and cleaned several times. There is no lint build up inside the dryer anywhere that we can find. It's in a tight space and the air vents from the dryer into a 90, left about 3 feet in flexible aluminum venting, then another 90 through the wall and outside. This is all new venting and is unobstructed. We removed all venting and dried a load just venting into the room (condensation all over the house from this!) and noticed no difference in drying time. Air venting out is a strong, warm flow. The blower does not feel loose. We don't hear any odd noises or rattles. The gas valve solenoid coils have been replaced with no difference to the drying time. When the dryer is started, the ignition glows orange, the flame starts and runs within about 30 seconds. the dryer feels pretty warm, but we are new to natural gas and I'm not sure hot hot it should feel. I just know that it is taking a very long time to dry. The clothes are coming from a front loader washer and are more damp than wet.
Does anyone have any suggestions of what I can test next before we have to call a tech to come out? Ideally, I would like to avoid that to save on cost. Any ideas and how-to would be much appreciated!