Hi I have a GE Profile DPGT750GC gas dryer and it doesn't heat. I've had this model for a few years and it worked fine until about last year. The drying wasn't good at times but didn't happen often to pose a problem. Now the dryer doesn't dry at all. I open the door midway through a cycle and get hardly any heat sense or very low even when the temp is on med. or high. I also would run a cycle and stay to listen. Most times I hear a weird sound like an engine dying down and then i would hear a faint beeping sound at certain intervals. I would look to the back and see the, I'm sorry I forget what its called,( the silver venting hose?) and I knew the dryer was working when it would expand. Now it doesn't do that. I need help. I would rather not have to buy a new one. This was a good model and I want to try to save it. Thank you for time and help.