Except for the power cord and the exhaust vent, the components that make up the dryer are contained in a sheet metal box. Each component acts independently of the others, but all are interrelated in some way. There are several different ways to disassemble the cabinet for tests and repairs, depending on the manufacturer and model of the machine. Basic disassembly procedures are simple.
Some knobs may be held to their shafts with setscrews. Unscrew the fasteners and pull the knobs straight out. To get at most parts, however, only remove the back panel. Don't disassemble the rest of the cabinet until you're sure you can't make the tests, replacements, or repairs from the back. If the light in the dryer burns out, remove it from the dryer. You may need to remove retaining screws and panels to access it. Replace the burned-out bulb with a new one of the same type and wattage; check the ends of the old bulb for this information. Then replace any retaining panels. Here's how:
Step 1: To remove the back panel, remove a series of screws or bolts that hold the panel to the top and sides of the cabinet.
Step 2: To remove the lower front panel, pull it away from the bottom of the cabinet. Lift the lower panel up and away. Remove the springs under each side of the lower panel.
Step 3: To remove the top panel, wedge a stiff-bladed putty knife under the rim of the top and pry the top off. The putty knife helps release several spring fasteners at the top of the cabinet sides and front.
Step 4: To remove the dryer's control panel, remove the screws that hold it to the cabinet top or front. These screws may be under a piece of metal or plastic trim; pry off or unscrew the trim. Most knobs are friction-fit; pull them straight out.
Caution: When testing or repairing the electrical parts of a gas dryer, remember that the dryer is hooked to a gas pipe. Turn off the shutoff valve on the supply pipe before disconnecting the gas supply line or moving the dryer and before doing any electrical work.