56
13 - TROUBLE SHOOTING
YES
Remove all liquid
from connector.
Check for leaks.
Repair all leaks.
Replace Control Module
Replace Return Water
Sensor
Is correct harness connected to return
sensor (2 Brown Wires)?
YES
NO
Correct wiring
Unplug molex connector on return
sensor. Is there moisture or liquid on
metal pins? Liquid might be water or
antifreeze solution.
NO
Is Heat Exchanger Pump
properly oriented?
(Pump arrow pointing down?)
YES
NO
Disconnect harness from
Return Water Sensor. Measure
resistance using digital ohm
meter. Is resistance between
950 to 33,000 ohms?
Install Heat
Exchanger Pump in
proper orientation
YES
NO
Replace Control
Module
Verify order of pins on J2. Pin order
should be: empty, black (or red), white,
green. Measure volts on pins of black
wire and white wire. Is wiring/pins in
right order? Does black/wire have 120
VAC? Does white wire/pin have 0 VAC?
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