heat would initially come on then go off or sometimes not come on at all.

1. unpluged the dryer and turned off the gas.
2. pulled dryer out so i'd have ample room to work on it.
3. used large flat blade screwdriver in the front between the top lid and dryer face to gently pop-up the lid.
4. removed 4 screws from inside, that hold the face to the main box leaving the wires all intact.
Found the coils on the lower left, held in place by two screws and plate.
5. took a good look at thier orientation before unpluging old and installing new, I recommend one at a time.
6. Vacuumm any exceess lint and check foam seal between lint trap and exhuast duc, the glue came undone on mine causing extra lint dust that is potentially flamable.
6. screw dryer front back on to main box, make sure to check wiring harness and that all electrical blade connectors are still pluged in to their componants.
7. At this point plug in, turn on gas and do a test run.
8.if everything checks out good then lower top make sure flexable exhuast hose is still connected on hte back of the dryer.
9. Tell your wife or girlfriend or husband or boy friend they can now finish your laundry :)