I have a whirlpool gas dryer model LGR6620PQ0. The timer wont advance and i have to fool with ithe timer to get the heat to kick on. And even then the heat will shut off randomly sometimes. It spins fine. Its about 5 yrs old. I've been looking around online, but cant find the same issue. I've taken it apart and cleaned everything and the vent exhaust is clean. Also the door sensor went out so i wirenutted the wires together, if that matters.