Appliance Desk 4000 Service Manual page 16

TF-2, the reading should be about 33Ω.
The impeller is blocked
11.2.4
check there is any deformation with the impeller and metal cover.
The dryer heaters not work
11.3
Poor wire connection:
11.3.1
and to the plug of JW2 on the electronic module (see Appendix 1).
The dryer heater is defective:
11.3.2
HDA-1 & HAD-2(750W), and HDB-1 & HDB-2(550W) at room temperature, and the
reading of A should be 17Ω; the reading of B should be 24Ω. If not, please replace the
new heater(s).
How To Replace The Dryer Heater?
Power off and unplug the unit.

Remove two screws and washers on the rear side of work top. Lift the work top up a little by

holding its rear side, and then push it towards the door to remove the work top.
Disassemble the top counterweight by removing two nuts and washers.

Disassemble the top cover of the chamber by removing five screws.

Unscrew the screws and remove the metal bracket on the heaters.

Disassemble the defective heater by removing the bolt.

Replace a new heater and re-assemble the unit by following the reserve steps.

※Please Note:
some silicon sealant should be painted on the mating faces of heater chamber.
: Disassemble the turbo fan unit from the blast chamber, and
Check for the wiring to the heating elements (see figure below),
Check for the resistance between the terminals of
To prevent the hot air from leaking out of the heater chamber,
~ 15 ~