Bosch SHE55P Repair Manual page 12

Plunger
Where plunger engages heater
4.1.3.5 Half Load
Starting with UC/33 dishwashers, Half Load replaced Top Rack
Only. Like Top Rack Only, it uses 30% less water, saving water
and energy. Unlike Top Rack Only with mechanical actuators,
Half Load is done by control software (through shortening cycles)
and doesn't limit water flow to the top rack.
4.1.3.6 Water switch
Motor operated water switches are mounted underneath heater
assemblies. They consist of a motor-controlled disk with 3 holes
which rotates and lines up over two sump ports (upper / lower
spray arms) to provide precise water control to upper, lower or
both spray arms.
702_58300000148618_ara_en_a
Top view
Bottom view
Where plunger engages sump
Models with water switches & Top Rack Only use water switches
to divert water. Separate actuators aren't needed.
Microswitch
European disk shown,
which is different than
U.S. disk
Disk
Models with water switches need stronger circulation pumps (#
437345) with separate motor starters (# 182318).
pumps, heaters & sumps for water switch / non-water switch
models can't be interchanged.
4.1.4 Circulation pumps
Bosch dishwashers use separate circulation and drain pumps to
reduce overall size, noise, vibration and energy consumption.
This allows the use of tall tanks, increasing overall space inside
dishwashers where full-sized plates can be placed in both upper
and lower racks. Circulation pumps are suspended by rubber
straps to further reduce noise and vibration.
Depending on features, dishwashers have one of four types of
circulation pumps. Pumps use different controls, wire harnesses,
heaters & sump filters, so replace with identical replacement
pumps.
Cam
Circulation
Page 12 of 42