UD-35 SERVICE UPDATE FIRST HALF—2009 - Whirlpool
UD-35 SERVICE UPDATE FIRST HALF—2009 - Whirlpool
UD-35 SERVICE UPDATE FIRST HALF—2009 - Whirlpool
Create successful ePaper yourself
Turn your PDF publications into a flip-book with our unique Google optimized e-Paper software.
PRESSURE SWITCH VS PRESSURE SENSORS<br />
Pressure Switches, even<br />
adjustable ones, are only<br />
switches. They do a very<br />
good job but do not have the<br />
sensitivity of Pressure Sensors.<br />
A limiting factor for a<br />
Pressure Switch, when<br />
coupled with electronic<br />
technology, is that if the<br />
water level in the tub drops,<br />
or there is a pressure leak in<br />
the hose, the switch will not<br />
react until there is a sizeable<br />
differential.<br />
The Pressure Sensor, an electronic device, does not switch – it measures and<br />
reports its findings to a control. It has the ability to measure minute drops in water<br />
level or air pressure. So, slight changes from a siphon effect, water leak or pressure<br />
hose leak will get reported to the control. The control will then try to make<br />
adjustments or give failure codes. Diagnosing units that have Pressure Sensors<br />
requires careful inspection of the air dome, pressure hoses, wire connections and<br />
drain systems.<br />
23 Continued next page
Change language