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Check the Water Softener:
If fitted, check the water softener coils, these can be checked at harness P202
Remove the water softener harness from the controller, and using a multimeter check the resistance
between pins 1 & 2 for the softener bypass coil - take care not to spread the pins with the meter probes.
The following resistances should apply:
65 Ohms (+/- 10 Ohms)
Check the resistance between pin 3 & 4 for the brine pump,
The following resistances should apply:
65 Ohms (+/- 10 Ohms)
If shorted replace the coil, but continue to check the other components.
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Or, the coils can be checked with a multimeter at the water softener itself.