I have just repaired a hoover drier.
If the unit is woorking EXCEPT for the hot air.
Make sure that the lint filter on the front is clean and that the vent at the back is not obstructed.
If the vent and filter is ok you will have to open the back by undoing the screws on the rear panel about 12 of them.
The rear panel can then be removed and you should see the rear of the drum.
At about 11 oclock position there is a over temp switch and the connections to the heater element.
Make sure the power is removed! by removing the plug from the wall. NEVER rely on the power switch!
Use a multimeter on ohms setting to check the element resistance.
Place the meter probes on the two spade connectors at the top of the element. ( they protrude from the drum circumference by 20mm or so)
The element resistance should be about 10 ohms. If it is something like infinity or open cct the element is broken and requires replacing.
The thermo cutout switch should also be checked expecially if the element shows a low resistance as above.
IF this ok, it is worthwhile to carefully apply power to the unit and use your meter on AC volts mode to measure that AC pwr is getting to the element. You should see 120-240VAC on the element terminals when it is meant to be working.
If the element requires replacing, it can be removed by disconecting the wires to the therm switch, disconecting the ground terminal. Then undoing the nut on the drum hub and the screws around the hub shield. The two nuts on each side of the drum need to be removed to finally release the rear of the drum and the element. The rear of the drum and element can now be maneuvered out of the rear of the machine and the element should be seen.
It is a blackish tube about 5-8mm around the edge of the drum rear and is held in place by little clips (in my case the element had shorted to the metal drum and had broken into two pieces.
Get a replacement element fit and replace parts in reverse order.
Check you wiring make sure that live wires are not shrting to ground and it should be ready to go.
nicsky, September 2010